Respiratory System- brings oxygen into the body and carries carbon dioxide out of the body Nose Air enters the body (from nostrils to nasal passage) Mouth Air enters the body Trachea The airway through which respiratory air travels. The rings of cartilage within its walls keep the trachea open. DiaphragmThe main muscle in breathing. Lungs Transport oxygen form the atmosphere into the blood and release carbon dioxide from the blood into the atmosphere. Bronchi The trachea divides into two main bronchi. The bronchi extend into the lungs spreading in a tree-like manner as bronchial tubes which then leads to the bronchioles.

Digestive system- break down of food and absorption of nutrients. Food needs to be broken down into small parts to enter the cells. Mouth Food is mechanically broken down (and some chemical digestion due to enzymes in the saliva) EsophagusFood is carried to the stomach by muscle (peristalsis) movement StomachFood is chemically broken down by acids Small Intestine Nutrients are absorbed into the bodies blood stream Large Intestine Water is removed after nutrients have been absorbed RectumLower portion of large intestines. Feces are stored here before being excreted AnusFeces are excreted

Liver- produces bile which aids in digestion. Gallbladder- Stores bile and releases the bile into the small intestine. Pancreas- produces pancreatic juice (mixture of enzymes) which help bile in the small intestine to break down proteins, starches, and fats.

Circulatory system- transports nutrients, hormones, oxygen, water to cells. Removes wastes and carbon dioxide from cells. Heart Pump Blood Specialized body fluid that delivers substances Red Blood CellsTransports oxygen to cells and CO2 away from cells Blood vessels Network of “highways that transport materials Lymph Nodes A small ball-shaped organ of the immune system. Lymph nodes are found all through the body, and act as filters or traps for foreign particles

Blood vessels Arteries away from heart Veins to heart Capillaries to cells Arteries and veins are larger Capillaries are very tiny because they transport materials to and from individual cells

Excretory system- Responsible for the elimination of wastes produced by homeostasis. Urinary systemRemove liquid waste from (kidneys, ureter, bladder, urethra) the blood in the form of urine; keep a stable balance of salts and other substances in the blood Respiratory systemGets rid of carbon dioxide Integumentary systemReleases water waste as (skin, hair, nails, and exocrine glands) sweat Digestive systemGets rid of solid wastes