Anatomy

cell to cell junctions include

gap, tight, desmosomes

gap junctions

tiny tunnels or channels directly connecting the insides (cytoplasm) of two adjacent cells

tight junctions

like zippers or seals between your body's cells (especially skin and organ linings), creating a continuous, selectively permeable barrier that stops things from leaking between them and controls what passes through, maintaining separate compartments and balance

desmosomes

"spot welds" or strong rivets between cells, forming powerful adhesive junctions that give tissues mechanical strength

stratified epithelium means…

2+ cell layers

Psuedostratified epithelium means…

1 cell layer that looks like more than 1

simple squamous function

diffusion, absorption, secretion

simple cuboidal function

absorption, secretion

simple columnar function

absorption, secretion

Pseudostratified columnar function

move mucus

Stratified squamous (keratinized) function

waterproof skin

Stratified squamous (non-keratinized) location

mouth, esophagus, anus, vagina

dense irregular location

dermis, ends of boes, capsule of organs

transitional tissue location

bladder, ureters

hyaline cartilage location

nose, costal cartilage, trachea

fibrocartilage location

pubic symphysis, intervertebral discs, meniscus

which cartilage is strongest

fibrocartilage

cillia

cell extensions that move in unison to move mucus, egg, and sperm

villi

tissue extensions that increase surface areas for absorption

flagella

cell extensions that propel sperm

why are bones strong

calcified matrix

why are bones flexible

collagen

how many true ribs are there

7

how many false ribs are there

3

how many free floating ribs are there

2

tendons

connect muscle to bone

ligament

connect bone to bone

myoglobin

stores O2 in muscles

creatine

a molecule that regenerates ATP from ADP using its phosphate

uring vigorous exercise, there may be insufficient oxygen available to completely break down

pyruvic acid for energy. As a result, the pyruvic acid is converted to

lactate