Lab # 4 Tissues

Question 1

The 4 namings on its number of cell layers:

Answer 1

1. simple (w/ one layer)
2. stratified (multi-layered)
3. pseudostratified (specialized epithelium found in only a few places)
4. transitional (e.g. in the urinary bladder to accommodate stretching)

Question 2

The 3 namings after the shape of cells:

Answer 2

1. squamous (flattened)
2. cuboidal (cube-shaped)
3. columnar (tall and cylindrical)

Question 3

What is the Apical surface?

Answer 3

Apical (free) surface:
this faces the lumen or outside of an organ and is not attached to other cells.

Question 4

What is the Basal surface?

Answer 4

The surface is almost always attached to an extracellular layer called the basement membrane, which attaches the epithelium to adjacent connective tissue

Question 5

What is the lateral surface?

Answer 5

Epitehlial cells use cell junctions to attach to one another on their lateral surfaces.

Question 5

Discuss how different tissues can work together to accomplish functions that the individual tissues would not be able to achieve.

Answer 5

forming an organ; the tissues that have similar functions can form an organ to perform a special function

Question 6

How is the structure of each epithelial, connective tissue class and subclass related to its function(s) in the body?

Answer 6

epithelial tissues are made of the cells fully packed of keratine, called keratinzed cells that provides the body with the superficial lining and protection for the contraction between the organs’ movement.

The connective tissues serves to
- bind and support (e.g. ligaments, tendons)
- protect (e.g. bones and catilage and adipose tissues)
- store & insulate (e.g. adipose tissue)
- transport (e.g. blood )

Hypodermis
With its areolar and adipose tissues with a lot of fibres in itself, it provides the body with elasticity, and insulation (for reducing heat loss), energy and blood reservation.

Question 7

Choose all of the features that are used to distinguish between different types of connective tissue
1) shape of cells
2) branching of cells
3) presence of specific cell types
4) types of extracellular protein fibres
5) number of nuclei in cells
6) extracellular ground substance
7) presence or absence of striations
8) number of cell layers

Answer 7

3) presence of specific cell types
4) types of extracellular protein fibres
6) extracellular ground substance

Question 8

What is the main function of muscular tissue

Answer 8

regulates movement throughout the body

Question 9

What is the main function of nervous tissue?

Answer 9

Makes up an entire organ system