Human Body Systems Human Body Systems Skeletal System

Human Body Systems

Human Body Systems Skeletal System: -consists of 206 bones -gives the body shape, support, and protection -works with the muscular system to allow movement -produces RBC’s, WBC’s, and platelets

Muscular System: - consists of over 600 muscles (skeletal, smooth, & cardiac) - works with the skeletal system to allow movement - moves blood through the blood vessels, causes heart to contract, and moves food through the digestive tract

Circulatory System: - also known as the cardiovascular system - consists of the heart, blood vessels, and blood - circulates blood throughout the body, as well as, nutrients, waste and gases; hemoglobin carries O 2 to body cells

Respiratory System: - consists of the nasal cavity, trachea, bronchioles, alveoli, lungs, and diaphragm - allows for respiration (breathing) to occur; controls gas exchange between blood and lungs

Digestive System: - consists of the mouth, esophagus, stomach, small intestine, large intestine, and anus - other organs that help produce and store enzymes that aide in digestion are the liver, gall bladder, and pancreas - digests or breaks down food; absorbs nutrients, removes waste, maintains water and chemical balance

Excretory System: - also known as the urinary system - consists of the kidneys, ureters, urinary bladder, and urethra - removes nitrogenous wastes from blood in the form of urine

Nervous System: -brain, nerves, spinal cord -carries messages in the form of nerve impulses throughout the body neuron

Central vs. Peripheral Nervous System Central brain spinal cord Peripheral motor neurons sensory neurons

Endocrine System: - consists of the pituitary, adrenal, thymus, thyroid, and parathyroid glands - also part of this system is the pancreas, ovaries, and testes - this system produces hormones, helps regulate body temperature, & maintains homeostasis

Lymphatic System: consists of lymph nodes and lymphatic vessels, as well as, spleen, thymus, tonsils, appendix and bone marrow - filters the blood, tissue fluid, and maintains fluid balance throughout the body -

Reproductive System: Female: consists of the ovaries, fallopian tubes, uterus, and vagina Male: consists of the prostate gland, testes, and penis -produces gametes for reproduction

Immune System: - - includes bone marrow, lymph nodes, lymphocytes, WBC’s, and antibodies defends body against infectious agents

Integumentary System: - - includes skin, hair, nails, sweat glands serves as a protective barrier for the body; prevents dehydration, and regulates body temperature