Pratical #1: Tissues

Simple Squamous Epithelium

-very thin tissue: allows stuff to pass through

Main Function of Simple Squamous Epithelium

Diffusion & Filtration

Simple Cuboidal Epithelium

takes in things and releases them

Functions of Simple Cuboidal Epithelium

Absorption and Secretion

Simple Columnar Epithelium

“acts like a tree”

Absorbs nutrients and secretes mucus

Functions Stratified Squamous Epithelium

-multiple layers = protection

Pseudostratified Columnar Epithelium

secretes mucus to trap dirt and use cilia to sweep it out of the airways to keep clean

Cilia

hair-like projections

Transitional Epithelium

lets organs expand and hold liquid while acting like a protective barrier

Hyaline Cartilage

thin and transparent cells

-serves as cushion

Elastic Cartilage

-Dark fibers

Maintains the shape of the structure while allowing flexibility

Fibrocartilage

-thick and pink fibers

-smaller cell clusters

Function: strength with absorb compression shock

Reticular Tissue

found in framework of liver, lymph modes, bone marrow, and spleen

-black fibers: collagen fibers (reticular fibers)

Areolar Tissue

-found around blood cells and layers of the skin

contains elastic fibers (thin, hair-like fibers)

Dense Regular Tissue

found in tendons and ligaments

Adipose Tissue

found around organs between muscles

Bone (Osseous Tissue)

supports and provides levers for the muscles to act on

Fibroblasts

purple cells

Skeletal Muscle

-attached to bones

VOLUNTARY

-Striated (striped)

Functions: body movement, posture, and heat production

Cardiac Muscle

-found ONLY in the heart

INVOLUNTARY

-muscle fibers with one or two nuclei

-branch-like appearance

Responsible for pumping blood

Smooth Muscle

-found in the walls of hollow organs

INVOLUNTARY

-no stripes

Responsible for moving substances through internal organs