Organs and Systems %253A%253Arev%253A%253A-1-%253A%253Aof%253A%253A-Biology/ Video:

Hierarchy of Organization CELLS TISSUES ORGANS SYSTEMS

Human Organ Systems

Digestive System tro_cross_500.jpg

The Mouth & The Esophagus The Mouth Teeth - mechanical breakdown of food Saliva – chemical breakdown of food o Produced by salivary glands in the epithelial tissue The Esophagus Muscular tube – smooth muscle tissue Movement of muscle is controlled by nerve tissue

The Stomach Holds and churns the food Epithelial tissue lining secretes enzymes, acid and mucus Nerve signals causes contraction of smooth muscle tissue which continues digestion of food

The Small Intestine First part of small intestine: Digestion Accessory Organs: Pancreas, Liver and Gall bladder Second half of small intestine: Absorption o Millions of interior folds – villi and microvilli

The Large Intestine Colon, Rectum and Anus Large diameter and shorter length than small intestine Absorb water, vitamins and various salts Remaining solid matter - feces icles/image_article_collections/anatomy_pages/intestines.jpg

Review – Digestive System hill.com/sites/ /student_view0/chapter26 /animation__organs_of_digestion.html hill.com/sites/ /student_view0/chapter26 /animation__organs_of_digestion.html

Excretory System Removes liquid wastes from the body Absorbed water moves from large intestine (digestive system) into the blood vessels (circulatory system) Blood vessels passes through kidneys for filtration Formed urine is stored in the bladder 2.jpg

Circulatory System Transports materials around the body 3 components of circulatory system: blood, heart and blood vessels odvessels.jpg function.jpeg

The Heart Types of tissues – Cardiac muscle, Nervous, Connective (Blood) Contractions of heart pushed blood through the body Valves – Prevent backward flow of blood Picture.gif

Pathway of Blood Flow Deoxygenated blood from body Veins  Heart (Right)  Artery  Lungs Oxygenated blood Vein  Heart (Left)  Artery  Body Review: =mH0QTWzU-xI =mH0QTWzU-xI Circulation Song: =q0s-1MC1hcE&feature=related

Open vs. Closed Circulatory System Open o One major blood vessel that carries oxygenated blood to body Closed o Blood stays in arteries and veins

Measure your Pulse Activity

Capillaries Connects veins and arteries 1 epithelial cell thick Brings blood close to all different cells and tissues throughout the body Deliver oxygen, nutrients and picks up waste from cells and transport it to kidneys and liver

Heart Disease and Stroke Causes of Heart Disease Hypertension – High blood pressure Arteriosclerosis - Thickening of arterial walls Heart Attack Long term blockage of blood flow to a portion of heart and thus, damaging it Stroke Blockage of blood vessel in the brain and leading to oxygen deprivation

Angioplasty Procedure designed to open a clogged blood vessel Surgeon inserts a tube in the blood vessel and the balloon is inflated Video: /watch?v=S9AqBd4RExk /watch?v=S9AqBd4RExk

Respiratory System Responsible for gas exchange in the body o Provides oxygen needed by the body and for removing carbon dioxide produced Works in close collaboration with the circulatory system

Respiratory System Air enters through nose, passes epithelial cells with hair-like projections (cilia)and mucus Epiglottis opens so air can go through Air passes through bronchi, bronchioles and ends up in small sacs called alveoli overview-picture.jpg

Gas Exchange Each alveoli is surrounded by a network of capillaries As concentration of O 2 is higher in the lungs than blood, O 2 moves into capillaries by diffusion Excess CO 2 diffuses from the cells into the blood, eventually ending up in lungs and exhaled outside Video:

Smoking Damages cilia Smoke contains over 4000 chemicals, some are carcinogenic High levels of carbon monoxide Contains tar

Anatomical Arrangements The interaction between the human skeleton and the muscles attached to it allows us to move parts of our bodies

Homework Homework P. 107 # 3 - 7