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Human Body


Integumentary system serves as a barrier against infection and injury, helps to regulate body temperature, removes waste products from the body, and provides protection against ultraviolet radiation from the sun
Epidermis outer layer of the skin
Dermis innermost layer of the skin
Subcutaneous layer fat cells beneath the skin
Keratin tough fibrous protein found in skin
Melanin dark brown pigment found in skin
Sebaceous gland produce an oily secretion called sebum that spreads out along the surface of the skin and helps to keep the epidermis flexible and waterproof
Skeletal system supports the body, protects internal organs, provides for movement, stores mineral reserves, and provides a site for blood cell formation
Cartilage strong connective tissue that supports the body and is softer and more flexible than bone
Ligament strip of tough connective tissue in a joint that holds bones together
Tendon tough connective tissue that joins skeletal muscles to bones
Tendonitis inflammation of a tendon from overuse
Arthritis inflammation and stiffness of the joints
Osteoporosis condition in which the bones become brittle and fragile from the loss of tissue
Joint place where one bone attaches to another
Periosteum tough layer of connective tissue that surrounds bones
Compact bone thick dense layer beneath the periosteum
Spongy bone less dense tissue found inside the outer layer of compact bones
Bone marrow soft tissue inside cavities within bones; 2 types are yellow and red
Muscular system tissue that controls the internal movement of materials in the body, as well as external movement of the entire body or body parts
Smooth muscle usually not under voluntary control and can function without nervous stimulation
Cardiac muscle found in the heart
skeletal muscle attached to bones and responsible for voluntary movements such as typing or dancing
Actin and myosin proteins that mainly make up the thin filaments in striations in skeletal muscle systems
Nervous system controlas and coordinates functions throughout the body and responds to internal and external stimuli
Neuron cells that transmit electrical signals (impulses)
Impulse electrical messages carried by the central nervous system
Cell body largest part of a neuron which contains the nucleus and the cytoplasm
Dendrites short branched extensions from the cell body that carry impulses from other neurons toward the cell body
Axon long fiber that carries impulses away from the cell body
Myelin insulating membrane that surrounds the axon
Synapse location where a neuron can transfer an impulse to another cell
Neurotransmitter chemicals used by a neuron to transmit an impulse across a synapse to another cell
Central Nervous system relays messages, processes information, and analyzes information
Brain main switching area of the central nervous system
Spinal cord main communication link between the brain and the rest of the body
Meninges three layers of connective tissue wrapped around the brain and spinal cord
Cerebrum largest and most prominent region of the brain...site of intelligence, learning, and judgement
Cerebellum second largest region of the brain located in the back of the skull...coordinates and balances the actions of the muscles
Brain stem located just beneath the cerebellum, connects the brain and spinal cord
Thalmus receives messages from the sense organs and relays the information to the brain
Hypothalmus control center for hunger, thirst, fatigue, anger, and body temperature
Pituitary gland gland in the base of the skull that secretes 9 hormones that regulate many body functions
Cerebral hemispheres groove that divides the cerebrum into a right and left side
Cerebral lobes each hemisphere of the cerebrum is divided into regions called _____ _______
Created by: gmottola