#6 histology (muscle & nervous tissue)

what kind of tissue is muscle

contractile (can shorten and lengthen)

three subtypes of muscle

• skeletal

• cardiac

• smooth

skeletal muscle →

• is it striated or non striated?

• what is it used for?

• striated (striped)

• used for voluntary movement

cardiac muscle →

• is it striated or non striated?

• where is it found?

• what is it used for?

• striated (striped)

• found in the heart

• involuntary movement

smooth muscle →

• is it striated or non striated

• where is it found?

• what is it used for?

• non-striated

• found in areas that are required to stretch (eg. esophagus, bladder uterus)

• involuntary movement

nervous tissue consists of

1. neurons: cells that conduct electrical impulses

2. glial cells: surround and protect neurons

membranes, the three types

composed of two or more tissues. simple organs, form continuous multi-cellular sheets

1. mucous membranes: mucosa

2. serous membranes: serosa

3. cutaneous membrane: skin

mucous membranes →

• what does it line?

• what layers are present?

• line cavities that open to outside of the body (non-sterile)

• epithelial layer present (can be simple or pseudostratified)

• connective tissue layer (areolar / lamina propria)

serous membranes →

• what does it line?

• what does it cover?

• what kind of membrane does it have, what is the membrane composed of?

• line cavities that don’t open to the outside of the body (sterile)

• covers organs located within cavities (eg. thoracic (chest) cavity, abdominal cavity)

• double membraned: composed of epithelial and connective tissues

visceral layer (serous membrane)

covers organs

parietal layer (serous membrane)

against the wall of the thoracic and abdominal cavities

pleura (serous membranes) →

• what does it surround?

• what does its visceral layer contact?

• what does its parietal layer contact?

• surrounds lungs

• visceral layer contacts lung surface

• parietal layer contacts thoracic cavity wall

pericardium (serous membrane) →

• what does it surround?

• whatdoes its visceral layer contact?

• what does its parietal layer contact?

• surrounds heart

• visceral layer contacts heart surface

• parietal layer contacts mediastinum (surroundings)