Stack Exchange Network

Stack Exchange network consists of 174 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [tissue]

An organization of cells sharing functional similarities.

0
votes
0answers
7 views

Osteoblast precursors distribution

I am trying to make a mathematical model of bone remodelling. I want to know if osteoblasts can move. From where do they appear at the resorbed site? Are osteoblast precursor cells already present ...
0
votes
0answers
24 views

Lamellar corpuscle, loose or dense connective tissue?

The Lamellar corpuscle is approximately oval-cylindrical-shaped and 1 mm in length. The entire corpuscle is wrapped by a layer of connective tissue. I wonder if its tissue is loose connective tissue ...
2
votes
1answer
21 views

White blood cells after dealing with an infection

I just have a quick question. If there was an infection of a tissue within the body, white blood cells would leave the capillaries around the tissue and enter the tissues to help cure the infection. ...
3
votes
1answer
69 views

Is pith a ground tissue with no specialized function?

Here is a question from the book My Max Score SAT Biology E/M Subject Test (where the SAT is the exam taken by American high school students): Ground tissue with no specialized function A. Xylem ...
0
votes
0answers
11 views

making tissues grow in vitro

I heard during a class on morphogenesis that it is not possible to make any tissue grow in vitro. The example that was given was about epithelium, for which people are using cancerous cells. Why is ...
1
vote
0answers
25 views

Can Anyone Identify this Tissue?

I am hoping someone can identify the image below My wife felt a bug bite her and found this in her hair now she's worried that it was a tick. the photo is at 40X under microscope. I'm guessing it's ...
2
votes
0answers
55 views

Do all Fungi have similar cells?

I know that most fungi are not differentiated into tissues. And tissues are groups of specialised cells aiming to perform a collective function. Does it, then, follow that most fungi do not have ...
2
votes
0answers
51 views

due to hypersecretion of growth hormone why only terminal growth takes place?

why only terminal growth takes place in acromegaly and gagiantism, due hypersecretion of GH?
0
votes
1answer
36 views

What are the roundish objects in this figure of a tracheid?

I got this picture from Wikipedia. What are the roundish stuffs that I'm seeing? The link is given below. Also are tracheids sclerenchyma cells? https://i.stack.imgur.com/UEatS.jpg
2
votes
1answer
121 views

Might new bones evolve from soft tissue? [closed]

I wonder how bones evolve where there are none. (This is the question, read the sub-questions as examples :) ) Lets take an elephant as an example. If it was adaptive for the elephant, could bones ...
0
votes
0answers
41 views

Considering the function, how does the bone tissue is a connective tissue?

As we considering the materials which consists of the bone tissue we can clearly see ,it is a type of connective tissue. But considering the function, its main function is building the Skeleton. ...
0
votes
0answers
10 views

Polysporin/antibioltic ointment and agar plates

Has anyone tried applying a layer of antibiotic ointment to the surface of their agar after autoclave sterilization? A friend suggested that I use an antibiotic in my agar. So it got me wondering if ...
2
votes
0answers
34 views

seafood muscles - how do they work?

Today, first time in my life I ate seafood. It was a squid and a calamar. Note that I am biology layman, so please be merciful :( While dissecting my food I noticed that the tissues of those ...
0
votes
0answers
17 views

How much of a tissue is made from cells vs extracellular matrix?

How much of a tissue is made from cells vs extracellular matrix? (in any suitable unit ratios, such as volume or mass) I assume that the answer depends on the tissue - I'm interested in typical ...
2
votes
1answer
28 views

Is it possible to extract tissue-culture material from a seed?

Here is the problem: Tissue culture is cloning, and all plants from the same mother plant are identical. On the other hand, plants grown from seed are all different. If parent plants are genetically ...
1
vote
1answer
268 views

What do you mean by non cellular matrix [closed]

What do you mean by the non cellular matrix in which connective tissues are embedded?
0
votes
0answers
18 views

Does anyone know of a table/matrix that shows me relationships between cancer types?

Does anyone know of a table that links different cancers/can visually show me through a table or network whether the incidence of one cancer affects the incidence of a second cancer? I imagine the ...
0
votes
0answers
15 views

Collagen Type V

Lodish - Molecular Biology of the Cell: "Two quantitatively minor fibrillar collagens, type V and type XI, co-assemble into fibers with type I collagen, thereby regulating the structures and ...
0
votes
1answer
722 views

What are pit fields?

I found this statement from my biology text book, "The sieve tube elements and the companion cells are connected by pit fields present between the common longitudinal walls". Is the pit field same ...
4
votes
0answers
31 views

Recession of skin tan

In early October I was on a holiday near the equator and got tanned. Now, roughly 3 months later, the tan on my face and arms has gone almost entirely where my belly, chest and legs are still ...
1
vote
1answer
248 views

How do trees grow?

A nail is inserted into a tree's trunk at a young stage of its development. At which height will we find the nail after some years? Will it be found higher or at the same height(What extent of ...
1
vote
0answers
120 views

Does the Histogen Theory apply to plant roots as well as stems?

My school textbook briefly mentions a certain "Histogen Theory" (von Hanstein) of plant growth/development. However, I can't find any authoritative source on this matter online. According to my book, ...
1
vote
3answers
69 views

Is it possible to determine what tissue a DNA sample came from based solely on its sequence?

All cells have the same genome and differ only by the expression pattern. Is it possible to determine the tissue origin of a cell based on its DNA sequence using short tandem repeat (STR) analysis or ...
5
votes
1answer
927 views

Is there a surface or body cavity that does not have epithelium?

Is there any surface in the (human) body that is not covered with epithelium?
1
vote
1answer
86 views

most different human tissues with respect to gene expression profiling

Is there a PCA showing the relative distance in terms of gene expression / functional genomics among the different human tissue types? So far I have found: (1) A paper based on gene expression with ...
3
votes
0answers
41 views

Can anyone expolain this? Cell culture vials have strange hair-like condensation patterns

What is the hair-like polymer that condenses on the caps of the plastic cell vial? Inside vial are cells in a mixture of FBS and DMSO. The vials were frozen slowly in a special isopropanol-filled ...
1
vote
0answers
24 views

How are negligibly senescent animals dealing with senescent cell buildup?

Well known animals like the rougheye rockfish, which can be bought from the fish market, appear to be negligily senecent. Senecent cell buildup appears to play a key role in senecence, in mice at ...
0
votes
1answer
95 views

How is yellow elastic cartilage a true cartilage?

My book has only mentioned the fact but no reason is given so I would like to know the reason for it. I would like to know what more to add in the body but the question just doesn't get posted.
1
vote
0answers
31 views

How long can you store tissue on 4°C before B-cell extraction and culture?

We receive tissue regularly and extract B-cells for culturing, studying differentiation and survival with diffenet stimulation conditions. However, often the tissue arrives late afternoon and might be ...
12
votes
1answer
871 views

If cells regularly renew, why do we have scars?

Question may sound bit poetic but I have a pretty basic question here: Often we get a minor wound and cells renew and quickly "cover" it. But when we have deeper wounds, often they leave behind scars. ...
1
vote
2answers
63 views

Histology tissue

Can anybody tell me from where is this tissue taken and in with techique is it colored please ?
1
vote
1answer
8k views

What is the cell matrix?

What is the matrix in the cell, and how does it connect cells together? I read about this in my textbook. I know that a matrix is the material (or tissue) that connects other cells together. My ...
7
votes
1answer
257 views

How can soft tissue exist in dinosaur fossils?

In this article the author explains that they found soft tissues inside of 68-million-year-old dinosaur fossils. How can that be possible? It was believed that soft tissues cannot last more than a ...
1
vote
1answer
537 views

Tissues in plants and animals

What is the equivalent connective tissue in plants? Connective tissue in animals are mostly made up of collagen. What about in plants?
2
votes
2answers
6k views

Which organs/tissues are defined as “peripheral organs/tissues”

In the following paper [1], I encountered one term "peripheral organs". Literally, based on my understanding, it should be related to the organs/tissues, such as skin, hair and ear in the human, and ...
1
vote
0answers
33 views

Are the human placenta chorionic villi and villous tree the synonyms?

Are the human placental chorionic villi and the villous tree the synonyms? Or, if not, can I say that these tissues would have practically the same gene expression profile in an RNA microarray ...
1
vote
1answer
508 views

How do cells age and die if they are dividing into new cells?

If cells in our body keep on dividing into new cells how do they ever grow old? The only cells to grow old would be defunct cells or those who won't divide into new cells like nerve cells. What am I ...
0
votes
0answers
40 views

Synthetic biology: examples of cell orientation driven by genes or genetic modification

First of all, forgive for the naive question. I know that genes can drive the shape of cells, as the sickle-shaped red blood cells. On the spirit of synthetic biology or tissue engineering, does ...
8
votes
2answers
1k views

Why are skin moles (pigmented spots) circular in shape?

I have never seen a rectangular or triangular shaped mole. Is there any reason for why moles are roughly circular in shape?
0
votes
0answers
78 views

Diffusion coefficients of glucose in mammal tissues?

Where can I find estimates/experimental measurements of the diffusion coefficient of glucose in mammal tissues? Specefically I mean the inter-cellular space. I'm not looking for a specific tissue, so ...
1
vote
1answer
92 views

Normal cell diffusion in normal organism?

We know, that cancer cell can travel across an organism. Is this ABSOLUTELY impossible for NORMAL cells? For example, is it EXACTLY ZERO probability to find some bone cells inside liver or some skin ...
2
votes
3answers
3k views

Density of cells in human tissues?

Where can I find values, or estimates, of the density of cells in human tissues? Maybe an overall estimate, or distinct values for distinct tissues? Or maybe not human, but mammal tissues (which ...
9
votes
1answer
122 views

Do “scars” in humans replace all the skin layers or only some layers?

When someone has a cut or surgical incision that results in a "scar", is the scar tissue replacing all 3 layers of the skin (epidermis, dermis, hypodermis)? Or only the first one or two of them?
1
vote
1answer
81 views

Is there any possible way to take a DNA test without using blood in humans?

Is there any possible way to take a DNA test without the need to draw blood in humans? Any information will be useful for me.
2
votes
1answer
940 views

Why do some people burn and others tan?

Connected to What is happening when we get a tan? - Why do some people burn while other people tan? Very pale people tend to just burn while other people tan very nicely, what causes this difference? ...
11
votes
3answers
7k views

What is happening when we get a tan?

Almost everyone nowadays wants that nice summer tan, but what exactly is going on beneath the skin? I've heard a few different theories about tanning - such as a tan is nothing but the pigmentation in ...
2
votes
0answers
44 views

Regarding cryonics, why can't you freeze a living body and then thaw it later, fully functional?

Cryonics is very popular in science fiction today, as a method of preserving animals, including humans, for long time storage and thawing the tissue later in the future. What is the difficulties with ...
1
vote
3answers
211 views

Can a portion of human skin cells be modified in some way to generate light? [closed]

I have come across some species of living organisms who are able to emit light at whim. Can that ability be incorporated into a portion of human skin (a specialized tissue)?
4
votes
1answer
855 views

Trying to differentiate between the three muscle tissues with small pictures

For an assignment I have to differentiate the three types of muscle tissues in these three pictures . I'm having difficulty seeing the striations and branches etc. because the pictures are so small. ...
1
vote
0answers
1k views

How does air-liquid interface (ALI) culture work?

For studying diseases, such as chronic obstructive pulmonary disease (COPD), cells are often grown in air liquid interface. I understand that the common way of establishing this these days is to grow ...