Assignment # Levels of Organization Biology Mrs. McCarthy Thursday, April 27, 2017

I. Levels of organization in the body Cells Tissue Epithelial, Connective, Muscular, Nervous C. Organs Stomach, Liver, Heart D. Organ Systems Examples include digestive and circulatory systems

II. Tissues in the Human Body Epithelial Covering or lining tissues Connective Joins, stores and supports Muscle Internal and external movement Nervous Conducts electrical signals

III. Human Organ Systems Skeletal System Functions Support Protection Attachment

III. Human Organ Systems B. Muscular System 1. Functions a. Movement b. Posture C. Joint Stability

III. Human Body Systems C. Circulatory system 1. Functions a. Transport of oxygen, nutrients, and hormones b. Transports waste products c. Contains cells that fight infections

III. Human Body Systems D. Immune System 1. Functions a. Protection against disease b. absorption of excess fluid E. Respiratory System a. Gas Exchange (O2 and CO2) b. pH balance

III. Human Body System F. Digestive System 1. Functions a. absorption of nutrients b. breaking down of food G. Excretory System a. Collection of liquid waste b. Storage of wastes c. Disposal of wastes d. water regulation

III. Human Body Systems H. Reproductive System 1. Functions a. Produce hormones b. Produce egg and sperm cells I. Endocrine System Functions Hormone regulation Regulates metabolism

III. Human Body Systems J. Nervous System 1. Functions a. control movements b. control reflexes K. Integumentary System a. protection b. insulation

IV. Homeostasis- the ability to maintain a constant internal environment A. Self Adjusting 1. Gains and losses must balance B. Response alters internal conditions based on stimuli 1. Receptor, control center, effector 2. Feedback loops a. Negative b. Positive