lab 1 flashcards-general overview

what are the four main tissue types

connective, epithelial, muscular, nervous

where do you most often find epithelial tissues

lining and covering organs, including internal passageways

what is the main tissue of glands

epithelial tissues

• filtration

• absorption

• secretion

• protection

• excretion

• sensory reception

functions of epithelial tissues

what does simple mean

one layer of cells

what does stratified mean

multiple layers of cells

what does squamous mean

squished shape

what does cuboidal mean

square shaped

what does columnar mean

rectangle or column shaped

• regeneration: new cells can be made

characteristic of epithelial tissue

• has an apical and basal surface

characteristic of epithelial tissue

• cellularity and specialized contacts

characteristic of epithelial tissue

• supported by connective tissue (reticular lamina)

characteristic of epithelial tissue

• avascular

characteristic of epithelial tissue

• innervated

characteristic of epithelial tissue

what type of tissue functions as structural support and can join components of organ systems together

connective tissue

what is the common embryonic tissue for connective tissue

mesenchyme

what are the three types of connective tissue that mesenchyme makes

• connective proper

• fluid connective tissue

• supporting connective tissue

what are the two types of connective proper tissue

loose connective and dense connective

what tissues are considered fluid connective tissue

blood and lymph

what types of connective tissue are considered supporting tissue

bone and cartilage

what do osteoblasts do

BUILD bone

what do osteoclasts do

CRASH DOWN bone (break bone)

what do osteocytes do? where do they come from

they are matured osteoblasts that maintain bone tissue

what two connective tissues get ossified as you mature

• hyaline cartilage

• endochondral bone

• striated

• nuclei are t the edge of the muscle fiber

• tube shaped

skeletal muscle

• non striated

• nucleus is in the center of the cell

smooth muscle

• branching muscle fibers with striations

• has intercalated discs

cardiac muscle

what type of muscle has voluntary movement

skeletal

what are intercalated discs

special junctions between the cells that help electrical activity travel through the heart

what are the two cells that make up nervous tissue

glial cells and neurons

what does nervous tissue do

conduct electrical signals called action potentials throughout the body in order to have the body react

what are the four main parts of the integumentary system

skin, hair, nails, and glands

• separate to protect us from external environment

function of the integumentary system

• sense surroundings

function of the integumentary system

• temperature control using sweat

function of the integumentary system

• excrete small amounts of waste

function of the integumentary system

what are the two main layers of the skin

epidermis and dermis

how many layers are in the epidermis

5 layers

how many layers are in the dermis

2

what are the three types of hair

terminal, vellus, and intermediate

what is terminal hair

hair on the scalp, eyebrows, and eyelashes

what is vellus hair

peach fuzz

what is intermediate hair

hair on arms and legs

what are the three types of glands

merocrine, apocrine, and holocrine

what is a merocrine gland

a gland that secretes waste directly into the duct

what is a apocrine gland

a gland that pinches off part of itself to secrete the waste

what is a holocrine gland

a gland that sheds off entire cells to release its waste. a new cell replaces the old one

what is 1 called

the root sheath (what you see on external skin)

what is 2 called

hair root

what is 3 called

hair papilla

what is 4 called

hair bulb

what type of muscle is this

skeletal

what type of muscle is this

cardiac

what type of muscle is this

smooth

what structure is this

intercalated disc