composed of similarly specialized cells that perform the same function in the body
Tissue
Four types of tissue
Epethial
Connective
Muscular
Nervous
Tissue that lines the body surfaces and cavities
Epithelial
Tissue that supports and bonds body parts
Connective
Tissue that moves the body and its parts
Muscular
tissue that recieves stimuli and conducts impulse
Nervous
Outer cells are falttened
Squamous
Outer cells are cubed shaped
Cuboidal
OUter cells are rectangular
COlumnar
Single layer of cells
Epithelial Tissue Single
Multiple cell layers
Epithelial Tissue Stratified
Appears to be multilayered but is actually only one layer
Epithelial Tissue Pseudostratified
secrete their products into a duct
Exocrine glands
secrete their products directly into the bloodstream
Endocrine glands
composed of closely packed tough fibers and is found in structures such as tendons and ligaments
Dense fibrous connective tissue
fat is used for energy and insulation
Adipose tissue
provides flexible support
Cartilage
strong support and protection
Bone
transports nutrients and wastes
helps protect us from disease
Blood
Voluntary
Skeletal Muscle
occurs in blood bessels and walls of the digestive tract
is involuntary
Smooth Muscle
Pumps the blood
Cardiac Muscle
Support and nourish neurons
Neuroglia
conduct nerve impulses
Neurons
take input into cell body
Dendrites
Integrates information
Cell body
take output away from cell body
Axon
Anterior and above diaphragm
Consist of Lungs and Heart
Thoracic cavity
anterior and below diaphragm
consists of spleen and most he digestive organs
Abdominal Cavity
anterior and near the hips
Contains urinary bladder and reproductive organs
Pelvic cavity
More posterior
Consists of brain and spinal cord
Dorsal cavity
-Protects the underlying tissues from trauma,pathogen invasion, and water loss
-helps to regulate body temperature by sweating
-Synthesizes Vitamin D
-Helps us to be aware of our surroundings
Functions of the Skin ( Integumentary System)
Outer layer
Epidermis
Inner layer
Dermis
The maintenance of relatively constant internal conditions in an organism
Homeostasis
senses the condtion, responds to counteract the current condition and returns values to normal levels
Negative feedback
sense the condition, responds to increase the current condtion
Positive feedback