Histology Pt 1 Flashcards Preview

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Flashcards in Histology Pt 1 Deck (29):
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The study of tissues

Histology

1

The study of cells

Cytology

2

A group of associated cells and their intercellular substance working together to perform a specific function or functions.

Tissue

3

What are the four tissue categories?

1. Epilethium
2. Muscle
3. Nervous
4. Connective Tissue

4

What tissue has small cells closely packed together, can be apical or luminal surfaced, is avascular, and has a basement membrane?

Epilethium

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What are the four types of epilethium tissue?

1. Simple squamous epilethium
2. Simple cuboidal epilethium
3. Simple columnar epilethium
4. Stratified squamous epilethium

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Single layer of cells

Simple

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More than 1 layer of cells

Stratified

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Very thin, scale-like

Squamous

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Cube-like

Cuboidal

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Longer than wide

Columnar

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What tissue's function is absorption, and is located in the alveoli or lungs, kidney, glomerulus, and the walls of capillaries?

Simple squamous epilethium

12

What tissue has a function of lining cavities, ducts, and tubules, and is located in the ducts, tubules, and kidney tubules?

Simple cuboidal epilethium

13

What tissue produces mucus, has a special feature of a Goblet cell, and is located in the respiratory tract?

Simple columnar epilethium

14

What tissue's function is protection, has special features of stratum corners, stratum basale, and keratin, and is located in the skin and vagina?

Stratified squamous epilethium

15

Describe a cell that would tell you where you would find a simple squamous epilethium tissue, and list the cell's components.

Cheek cell; flat; cell membrane, nucleus, cytoplasm

16

Describe a cell that would tell you where you would find a simple cuboidal epilethium tissue.

Thyroid; cell nuclei often oval shaped

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List a columnar epilethium tissue's cell's components and describe the cell nuclei shape.

Cell nuclei are often oval and arranged in rows; Goblet cells

18

List the stratified epilethium tissues.

Stratum corneum
Stratum basale
1. Melanocytes - produce melanin
2. Merkel's Discs - sensory structures
3. Keratinocytes - make up most of the cells of the skin
4. Langerhan's cells - immune cells of the skin
Layers of epilethium in between

19

What are the characteristics of muscle tissue?

Elongate, tube-shaped cells (fibers), specialized for contraction, excitable: can propagate and electrical charge, and when contract produce movement

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What are the examples of muscle tissue?

Skeletal, cardiac, and smooth

21

What muscle tissue is peripherally multinucleate, has distinct striations, and provides voluntary movement?
(Hint: it is located in the arms and legs.)

Skeletal

22

What muscle has intercalated discs, is short-branched, has 1-2 nuclei, and has striations (less distinct)?
(Hint: it is located in the heart.)

Cardiac

23

What muscle is large, has a central, football-shaped nucleus, and has no striations?
(Hint: it is located in the stomach, intestines, and uterus.)

Smooth

24

What are the characteristics of nervous tissue?

Highly specialized tissue, responsible for generating impulses, extremely long processes, and has two main cell categories

25

What are the two main cell categories of nervous tissue? Describe them.

1. Neurons: functional cells of the nervous system
i. Soma
ii. Processes = extensions (axons and dendrites)
2. Neurologia: protects and supports neurons

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What is the function of nervous tissue?

Produces impulses and electrical signals for communication in the body

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Where is the nervous tissue located?

Brain and spinal cord, also peripheral nerves

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What are the cell components of nervous tissue?

Neurons, neuroglial cells, soma of a neuron, nucleus of a neuron, and processes (axons and dendrites)