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Histology Lab 3. [email protected] Muscle Tissues. Muscle Tissue Facts Well vascularized Highly cellular tissues Responsible for most types of body movement Posses myofilaments which cause movement or contraction in all cell types. Skeletal Muscle. Structure –

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Histology lab 3

Histology Lab 3

[email protected]


Muscle tissues
Muscle Tissues

Muscle Tissue Facts

  • Well vascularized

  • Highly cellular tissues

  • Responsible for most types of body movement

  • Posses myofilaments which cause movement or contraction in all cell types


Skeletal muscle
Skeletal Muscle

Structure –

  • Elongated cells

  • Cells are multi-nucleated

  • Nuclei are located on the periphery

  • Obvious striations throughout.

Nuclei

Skeletal Muscle


Skeletal muscle1
Skeletal Muscle

Location –

  • Attached to the skeleton

  • Occasionally attached to the skin

Skeletal Muscle


Skeletal muscle2
Skeletal Muscle

Function –

  • Voluntary movement

  • Warm blood as the muscles produce heat.

  • Locomotion

  • Facial Expression

Skeletal Muscle


Smooth muscle
Smooth Muscle

Structure –

  • Elliptically shaped cells with a centrally located nucleus

  • There are no striations present.

  • Cells are close together to form sheets.


Smooth muscle1
Smooth Muscle

Location –

  • Digestive tract

  • Walls of the Uterus

  • Blood vessel walls


Smooth muscle2
Smooth Muscle

Function –

  • Involuntarily controlled

  • Produces involuntary contractions through the linings of the digestive tract and ureters. This movement is called peristalsis.

  • Produces involuntary contraction and expansion of the blood vessels (vasodilation / vasoconstriction)


Cardiac muscle
Cardiac Muscle

Structure –

  • Centrally located nucleus

  • Striated

  • Has branching of muscle cells with intercalated discs

  • Involuntary control, control is actually inherent so no external stimuli is required to cause contraction


Cardiac muscle1
Cardiac Muscle

Location –

  • In the heart

Intercalated Disc


Cardiac muscle2
Cardiac Muscle

Function –

  • To contract continuously from inherent impulse.

  • Involuntary contraction.


Nervous tissue
Nervous Tissue

Nervous Tissue Facts

  • main component of the nervous system.

  • Contains 2 major cells types:

  • Neurons – are highly specialized nerve cells that generate and conduct nerve impulses.

  • Neuroglia – are supporting cells that are non-conducting that insulate and protect the neurons.


Nervous tissue1
Nervous Tissue

Structure –

  • Neurons are branching cells.

  • Cell processes may be quite long.

  • Motor neurons have many dendrites but one axon.

  • Motor neurons are myelinated.

  • Cell body is called a cyton.

  • Supporting connective tissue is called Neuroglia

Neuroglial Cells

Cyton


Nervous tissue2
Nervous Tissue

Location –

  • Brain

  • Spinal Cord

  • Peripheral Nerves


Nervous tissue3
Nervous Tissue

Function –

  • coordinates activities between the brain, spinal cord and body organs.

Cell Nucleus

Nucleus of

Neuroglial Cell


X section of spinal nerve
X – Section of Spinal Nerve

Epineurium – surrounds several groups of neurons.

Perineurium – surrounds a group of neurons.

Perineurium

Epineurium


X section of spinal nerve1
X – Section of Spinal Nerve

Endoneurium – is the covering around one neuron.

Axon – is the central grey spot.

Myelin – is the white surrounding the axon.

Axon

Endoneurium


X section of spinal cord
X – Section of Spinal Cord

Central Canal

Meninges

White Matter

Grey Matter



Practice Quiz

1.) a.) Name the tissue type below.

b.) What type of cell is labeled B?

B


Practice Quiz

2.) a.) Where in the body would you find this tissue type?

b.) What protein accumulates in the cells as you approach the apical surface of this tissue?


Practice Quiz

3.) a.) Name the cell type labeled A.

b.) Name the structure labeled B.

A

B


Practice Quiz

4.) a.) Name one function of this tissue type.

b.) Name one place in the body you would find this tissue.


Practice Quiz

5.) a.) Name the fiber type labeled A.

b.) Name this tissue type.

A


Practice Quiz

6.)a.) What is the function of mast cells?

b.) What is the function of fibroblasts?


Practice Quiz

7.) a.) Name this tissue type.

b.) What is the function of the cell labeled B?

B


Practice Quiz

8.)a.) Where in the body would you find this tissue type?

b.) What protein is the fiber labeled B made from?


Practice Quiz

9.) a.) Name this tissue type.

b.) Name the structure labeled B.

B


Practice Quiz

10.) a.) Name this tissue type.

b.) Name one function of this tissue type.


Exam notes
EXAM NOTES

  • Exam runs on November 13th from 4-7pm.

  • It is in IB1101.

  • It will be a power point exam similar to the practice tests.

  • You will have 1 minute per slide and 2 questions per slide.

  • The exam should take 21 minutes to write.


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