OBJECTIVE:  identify cells as the basic unit of life  describe how cells form tissues, organs and body systems

CELLS

◦ 100 trillion cells in the human body ◦ over 200 different types of cells ◦ skin, muscle, brain, blood, bone, ………

WHAT DO CELLS NEED TO GROW? Food for high energy and good growing power Cells need energy to grow, move, talk, think and play Eat lots of fresh fruit and vegetables milk whole grains, cereal, pasta meat …protein not too much junk food Food is digested … it is broken down into molecules tiny enough for the blood to deliver it to the body’s cells Water Oxygen for survival … it helps turn food into energy Where do cells get oxygen? we breathe in air, it goes into the lungs, then enters the bloodstream then the heart pumps moving the oxygen to the cells The average person breathes about 2,500 gallons of air each day

Do all cells in your body live as long as you do? No –s–some cells only live for a short period of time but when they die new cells take there place … example skin cells … live a few days –O–Other cells, like brain cells, live as long as you do … once they are destroyed they are not replaced –O–Our body’s grow when more cells are produced than actually die

Cells tiny compartments of life that make up all living things the building blocks of life cells work together to help your body function well cells come in different shape and sizes each cell does a special job … they make up –your skin cells, muscles, bones, your brain, and are in your blood

1) nucleolus (2) nucleus (3) ribosome (4) vesicle (5) rough endoplasmic reticulum (ER) (6) Golgi apparatus (7) Cytoskeleton (8) smooth endoplasmic reticulum (9) mitochondria (10) vacuole (11) cytoplasm (12) lysosome (13) centrioles within centrosomenucleolusnucleusribosomevesiclerough endoplasmic reticulumGolgi apparatusCytoskeletonsmooth endoplasmic reticulummitochondriavacuolecytoplasmlysosomecentrioles centrosome Parts of cells

Most cells have the same 3 basic parts: –cell membrane –cell nucleus –cytoplasm

OBJECTIVE:  describe how cells form tissues, organs and body systems  explain how body systems are interrelated  identify ways to keep your body systems healthy

Body Systems

tissues – groups of similar cells that do the same kind of work organ – a structure that is made up of different types of tissues that do a particular job systems – formed by a group of organs that perform a related task

Body Systems a group of organs that work together to support an important body function ??????? EXAMPLES ?????? ??????? EXAMPLES ?????? examples: Nervous System Circulatory System Skeletal System Muscular System Digestive System Excretory System Respiratory System examples: Nervous System Circulatory System Skeletal System Muscular System Digestive System Excretory System Respiratory System they work together to keep you alive and safe they work together to keep you alive and safe the systems of the body are organized by what they do, not where they are the systems of the body are organized by what they do, not where they are example - mouth and small intestine - digestive system

interrelated – the systems work together and are dependent on one another to keep the body functioning properly

The Body Systems and Their Function Skeletal System Muscular System Circulatory System Digestive System Excretory System Respiratory System Nervous System Supports the body, protects organs & helps you move Moves body parts and controls organs Transports materials, (food, oxygen, hormones), to cells and removes waste from cells …. Carried in blood Breaks down food into substances that your cells can use. Removes waste and controls the body’s water levels Supplies blood with oxygen and removes carbon dioxide Sends and receives messages to control all body systems

Ways To Keep Your Body Systems Healthy  Eat a balanced diet  drink plenty of water  exercise … be active  stay away from drugs and alcohol  don’t smoke … stay away from second hand smoke  manage your stress  exercise safely … warm-up, stretch, cool down  get enough rest  Follow common sense safety rules wear protective equipment when required wear a helmet wear seat belts