Human Anatomy - Tissues Flashcards
What is the
ECM of bone tissue?
Solid, calcified
What are the main cell types of bone tissue?
Osteoblasts and osteocytes
What do osteoblasts do?
Secrete collagen fibres and matrix
What do osteocytes do?
Live in lacunae and maintain bone metabolism.
What is the fibre type of bone tissue?
Collagen
How vascularized is bone tissue?
Well
What is the function of bone tissue?
Support and protect organs
Provide levers and attachment sites for muscles
Store calcium, other minerals and fat
Blood cell formation
Where is bone tissue found?
Bones
What is the functional unit of bone?
Osteon
What is the ECM of blood?
Liquid
What are the cells of blood?
Erythrocytes, Leukocytes, platelets
What is the function of blood?
Carry respiratory gases, nutrients and wastes.
Where is blood located?
In the blood vessels and heart
Coverings and lining of membranes are composed of both _________ tissue and _________ tissue.
Epithelial + connective
What are the three types of membranes?
Cutaneous, mucous, serous
Which membrane is dry, which is wet?
Dry = Cutaneous Wet = serous, mucous
Where would you find a cutaneous membrane and, what type of epithelium would be found there?
Location: Skin
Keratinized stratified squamous epithelium
Where do you find mucous membranes?
Lining hollow organs open to the exterior of the body.
Describe a mucous membrane.
An epithelial sheet underlain with a layer of lamina propria (areolar connective tissue; for mucus secreting epithelium)
What are the two cell types that can compose mucous membranes?
Deeper: simple columnar ciliated epithelium
Superficial: non-keratinized stratified squamous epithelium
Describe serous membranes.
Simple squamous epithelium lying on areolar connective tissue.
What do serous membranes line?
Closed cavities;
Pleural, pericardial, peritoneal
What cell type composes serous membranes?
Non-keratinized simple squamous epithelium (Mesothelium)
Describe skeletal muscle tissue.
Long, cylindrical cells
Multinucleated
Striated
What are the functions of skeletal muscle tissue?
Voluntary movement
Manipulation of environment
Facial expression
Where is skeletal muscle found?
Attached to bone (occasionally to skin)
Describe cardiac muscle cells.
Branching, striated cells.
Generally, uninucleate.
Cells interdigitated at inercalated discs.
What is the function of intercalated discs?
Keep muscle cells together so that they arent ripped apart during contraction.
What is the function of cardiomyocytes?
Contract to propel blood into circulatory system.
Involuntary control.
Where are cardiomyocytes located?
Occurs in walls of heart.
Describe smooth muscle cells.
Spindle-shaped cells with central nuclei.
Arranged to form sheets.
No striations.
What is the function of smooth muscle?
Propels substances along internal passageways.
Involuntary control.
Where is smooth muscle located?
Mostly walls of hollow organ.
What are the two cell types of nervous tissue?
Neurons and neuroglia
What are neurons?
Functional unit of nervous tissue.
What are neuroglia?
Glue together nervous tissue and support neurons.
There are _____ neuroglia than neurons.
More
What is the function of nervous tissue?
Transmit electrical signals from sensory receptors to effectors.
Where is nervous tissue located?
Brain, spinal cord, nerves
