Tissues: Chapt. 4

define tissues

group of cells that are similiar in function

4 types of tissues

nervous, epithelial, connective, muscle

Epithelial cells are found:

name 3 main types:

name 2 additionals:

variations?:

-found in rows or sheets

-squamous, cuboidal, or columnar

-with simple or stratified layer

Name all 8 different Epithelial types:

Simple Columnar, Simple Cuboidal, Simple Squamous

Stratified Columnar, Stratified Cuboidal, Stratified Squamous,

Pseudostratified Columnar, Transitional

Simple Columnar

-taller v.s wider

-nucleus is low in the center

-can be ciliated or non-ciliated

-can be found within digestive and respiratory system

Simple Cuboidal

-cells are shaped like 3-D squares

-found in kidneys

Simple Squamous

-thin, flat cells

-found in cheeks, lungs, & walls of capillaries

Stratified Columnar

-rare in body

-found in pharynx, male urethra, & glandular ducts

Stratified Cuboidal

-rare in body

-found in mammary glands & sweat glands

Stratified Squamous

-functions to protect underlying tissues in areas that are subject to abrasion

*Keratinized (cells are full of keratin and dead & found in epidermis of the skin)

*Non-keratinized (found in esophagus, mouth, and vagina)

Pseudostratified Columnar Epithelial

-single layer of cells w/ different heights

-function = secretion

*Ciliated (found in trachea & upper most respiratory)

*Non-ciliated (male sperm carrying ducts & ducts of large glands)

Transitional Epithelial

-has ability to stretch

-found lining the ureters & urinary bladder and part of urethra

#hint: helps stretch to store urine

Skeletal Muscle is vol or invol

and found where?

voluntary & triceps/biceps/quadriceps

Cardiac Muscle is vol or invol

and found where?

involuntary & found in walls of heart

Smooth Muscle is vol or invol

and found where?

involuntary & found in walls of hallow organs

Ex: stomach and uterus

Skeletal muscle functions include

helps in locomotion and facial expressions

Smooth muscle functions include

functions to propel substances along internal passages

Skeletal muscle functions include

push blood throughout the body

The Nervous tissue function is to ___ and what is found here?

transmits electrical signals throughout the body & neurons are found here

Name the 3 types of muscle tissue

skeletal, smooth, and cardiac

Name the 3 types of connective tissue

connective tissue proper, fluid connective tissue, and supporting connective tissue

Define connective tissue

very abundant & widely distributed throughout the body