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WHERE IN THE HUMAN BODY IS THE… •Circulatory system •Respiratory system •Nervous system •Digestive system •Endocrine system •Skeletal system •Muscular system •Integumentary system •Immune system INTRODUCTION TO HUMAN BIOLOGY Pages 907-910 LEVELS OF ORGANIZATION Cell Tissue Organ Organ System Organism (body) BODY TISSUES •Tissues: group of cells working together BODY TISSUES •Muscle: contract in coordination upon stimulation •Skeletal: voluntary movement •Cardiac and smooth: involuntary movement (you can’t consciously control their movement) BODY TISSUES •Nervous: receive and transmit information and signals (made of cells called neurons) •Doesn’t grow back once damaged •Long extensions allow for fast communication BODY TISSUES •Epithelial: cover inner and outer surfaces of bodies, cavities, and canals BODY TISSUES •Connective: bind, support, and protect structures in the body •Bone, cartilage, tendons, fat, blood ORGAN SYSTEMS •Organs: tissues working together •Organ systems: two or more organs working together for a specific function ORGAN SYSTEMS •Muscular: support and movement •Skeletal: protection and support ORGAN SYSTEMS •Circulatory: transport of •Respiratory: gas gases, nutrients, waste, exchange and chemicals to all parts of the body ORGAN SYSTEMS •Immune: fights pathogens •Integumentary (skin): protection ORGAN SYSTEMS •Endocrine: controls body •Nervous: regulation, functions via chemical conduction, and messengers coordination ORGAN SYSTEMS •Excretory: removal of liquid, gas, and solid wastes •Digestive: breakdown and absorption of food ORGAN SYSTEMS •Reproductive: production of sex cells and in females producing babies BODY CAVITIES •Organs housed and protected in cavities •Cranial: brain •Spinal: spine •Thoracic: heart and respiratory organs (diaphragm separates thoracic and abdominal) •Abdominal: digestive system organs •Pelvic: reproductive and excretory organs