Anatomy ch 3

Question 1

Histology

Answer 1

the study of tissues. synonymous with microscopic anatomy.

Question 2

3 primary germ layers

Answer 2

ectoderm-forms the outer epithelium and all of the nervous tissue in the body.
mesoderm- forms all connective tissue, muscle tissue, and epithelium linings of vessels and serious body cavities
endoderm- forms lining of epithelium of most parts of visceral body systems

Question 3

Muscle tissue

Answer 3

skeletal, cardiac, smooth. Derived from mesoderm

Question 4

structure of muscle tissue

Answer 4

Myofibers, muscle fibers, and myocytes are all the same

Question 5

structure of muscle tissue

Answer 5

Myofibers have myofibrils that have myofilaments

Question 6

describe myofibers and their structure

Answer 6

myofibers have elongated contractile organelles which are the myofibrils. myofilaments are the part that slide and contract

Question 7

Skeletal muscle

Answer 7

large, cylindrical shaped cells. Several nuclei located near peripheral of cytoplasm. Striated

Question 8

Cardiac muscle

Answer 8

increased or decreased by autonomic system. Y shaped connected by intercalated discs.

Question 9

smooth tissue

Answer 9

walls of vessels, hair follicles,iris of eye. they are unorganized therefore no striations

Question 10

Epithelial tissue

Answer 10

high regeneration capacity. 2 types Membranous and glandular epithelium. Derived from Ectoderm, Mesoderm, and endoderm

Question 11

Membranous epithelium

Answer 11

called surface epithelium and is avascular,aneural, and varies in thickness of cells

Question 12

different types of membranous epithelium

Answer 12

cuboidal,squamous,columnar,stratified,simple,pseudostratified,transitional,ciliated, microvillie, keratin

Question 13

Glandular epithelium

Answer 13

forms the secretory portion. Highly vascular, innervated but lacks a basement membrane

Question 14

2 types of glandular epithelium

Answer 14

endocrine- no contact with surface (hormones)

exocrine- has contact with surface by ducts ( sweat glands)

Question 15

Connective tissue

Answer 15

binds various parts of the body together. Allows for waste and gas to be exchanged. present in some degree in all organs. Derived from mesoderm

Question 16

connective tissue cells

Answer 16

fibroblasts- become fibrocytes when they become fairly incative

Question 17

fibroblasts secretions

Answer 17

Callagenous fibers- collagen relatively inelastic but strong
elastic fibers- elastin which is rubbery
reticular fiber - like small collagen. Most prevalent

Question 18

how is CT proper classified

Answer 18

fiber density ( loose/ dense), fiber arrangement( regular/irregular, parallel or not), fiiber type( which ever is most prevalent)

Question 19

Bone tissue ( connective)

Answer 19

osteoblasts, osteoclasts, osteocytes

Question 20

blood ( connective)

Answer 20

only liquid connective tissue. has RBC’s and WBC’s

Question 21

Adipose tissue (connective)

Answer 21

average individual has supply of 40 days. For steroids, insulation, energy

Question 22

Reticular connective tissue

Answer 22

modified reticulocytes that secrete reticular fibers. Present in lymph nodes, spleen, thymus, and medullary cavities.

Question 23

Bone Marrow

Answer 23

in medullary cavities

Question 24

primitive connective tissue ( mesenchyme

Answer 24

undifferentiated and can undergo metaplasia whenever needed

Question 25

Nervous tissue

Answer 25

is specialized for electrical impulses. Dendrites pull toward cell, Axon away. Derived from ectoderm.

Question 26

ecrine glandular glands

Answer 26

watery secretion with no structural parts. examples are some sweat glands slivary glands , pancreas , liver

Question 27

apocrine glandular glands

Answer 27

pieces of cells are included in secretion. examples are mammary glands and some sweat glands

Question 28

holocrine glandular glands

Answer 28

entire cells are included. examples are sebaceous glands, ceruminous glands of external acoustic meatus.