INTRODUCTION TO HUMAN BIOLOGY pp. 907-910
Levels of Organization Cell Tissue Organ Organ System Organism
BODY TISSUES
BODY TISSUES muscle: contract in coordination upon stimulation (skeletal, cardiac, smooth) nervous: receive and transmit information and signals (made of cells called neurons)
BODY TISSUES epithelial: cover inner and outer surfaces of bodies, cavities, and canals
BODY TISSUES connective 1. bone, cartilage, tendons, blood 2. cells surrounded by extra-cellular, non- living tissue
ORGANS tissues working together
ORGAN SYSTEMS Two or more organs working together for a specific function
ORGAN SYSTEMS Skeletal: protection and support Muscular: support and movement Skeletal: protection and support
Circulatory: transport of gases, nutrients, waste, and chemicals to all parts of the body. Respiratory: gas exchange
Integumentary (skin): protection Immune: fights pathogens Integumentary (skin): protection
Nervous: regulation, conduction, and coordination Endocrine: controls body function via chemical messengers.
Digestive: breakdown and absorption of food Excretory: removal of liquid, gas, and solid wastes
Reproductive: production of sex cells (offspring)
BODY CAVITIES Organs housed and protected in cavities spinal, cranial, thoracic, diaphragm, abdominal, pelvic