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Equine Evolutionary Anatomy > Tissue Structure and Organisation > Flashcards

Flashcards in Tissue Structure and Organisation Deck (17)
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1

What are the 3 layers of the integumentary system?

- the epidermis
- the dermis
- the hypodermis

2

Define EPITHELIAL TISSUE

Epithelial tissue is tissue composed of cells that line the cavities and surfaces of structures throughout the body. It is one of the simplest animal tissues.

3

What are the functions of epithelial tissue?

- to protect from dehydration
- to provide sensory surfaces
- to provide the first barrier to infection
- to secrete materials

4

What are the 7 types of connective tissue?

Bone, blood, skin, tendons, ligaments, cartilage and fascia

5

Define the EXTRA-CELLULAR MATRIX

The extra-cellular matrix is the non-cellular component in all tissues and organs. It consists of fibres (elastic and collagen) and ground substance. All three provide viscosity and plasticity.

6

What are the cellular components of tissue?

Fibroblasts, collagen fibres, elastic fibres, ground substance

7

Describe fibroblasts

Fibroblasts create the extracellular matrix and create the structural framework for animal tissue.

8

Describe collagen fibres

Collagen fibres are produced by fibroblasts. They aggregate into bundles.

9

Describe elastic fibres

Elastic fibres do not form bundles and have a huge ability to stretch.

10

In what ways is connective tissue classified?

As loose irregular, dense regular and dense irregular

11

Describe loose irregular tissue

It is the most common type of connective tissue which holds organs in place and attaches epithelial tissue o other underlying tissues.
Example: areolar tissue

12

Describe dense regular tissue

It is made of collagen fibres that are bundled together in a parallel fashion. It forms tendons/ligaments but has very poor bloody supply which is why they take so long to heal.

13

Describe dense irregular tissue

It is not arranged in a parallel fashion. It is mostly found in the dermis and is strong due to the amount of collagen it contains.

14

Define COLLAGEN

Collagen is the most abundant protein in mammals and the most common protein of connective tissue. It supports and holds things in position and consists of matrix or ground substances.

15

Define FASCIA

Fascia is the dense fibrous connective tissue that interpenetrates and surrounds the muscles, bones, nerves and blood vessels of the body.

16

Describe ground substance

A colourless, transparent and homogenous substance. It is primarily made up of glycosaminoglycans.

17

What are the functions of skin?

- defence
- protection
- sensory surface
- nutrition
- excretion
- pigmentation