Hesi A2-Histology, Cell, Mitosis/Meiosis and Skin

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Histology, Cell, Mitosis/Meiosis and Skin
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1

Histology

study of tissue

2

Tissue

a group of cells that act together to perform a certain function.

3

What are the 4 tissues?

epithelial, connective, nerve and muscle

4

Epithelial Tissue

Covers, lines and protect the body of its internal organs

5

Connective Tissue

framework of the body, providing support and structure of the organs.

6

Nerve Tissue

Composed of neurons and connective tissue cells that are referred to as neurolgia.

7

Muscle Tissue

Contract or shorten

8

Muscle tissue is classified as

voluntary muscle

9

Voluntary Muscles

skeletal muscles

10

Involuntary Muscles

smooth and cardiac

11

Cell

Basic unit of life

12

What are the levels of organization?

chemical, cellular, tissue, organ, organ, system organism

13

nucleus

Control center of the cell. DNA

14

Ribosomes

protein synthesis

15

Golgi apparatus

Packages, process and ship

16

Mitochondria

Powerhouse/ATP

17

Cell Membrane

Control what goes in/out

18

Mitosis

Duplicate and Distribute replacing cells necessary for growth and repair.

19

Where does Meiosis take place?

Gonads

20

What are the layers of the skin?

Epidermis, dermis and hypodermis

21

What are the 5 layers of the epidermis from the outer layer to the inner layer?

stratum-corneum, lucidum, granulosum, spinosum and basale.

22

Where does mitosis occur in the epidermis?

stratum basale and stratum spinosum

23

Meiosis

Cell division chromosomes reduce from 46 to 23.


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