Gerika

The Koala .Vs. The Human

To compaire the Human and Koala the we will first look at the human body systems. We will start with the Digestive system. The Digestive System

The Digestive system involves the breaking down of food into smaller pieces and also the mixing of food. In the Mouth the teeth bite off and chew food into a soft pulp that is easy to swallow. Enzymes in the saliva begin digestion of Carbonhydrates. The Esophagus takes food down from the throat and passes it down through the neck and into the stomach. The stomach's thick muscle contracts to mash the food into a water soup called chyme. The stomachs lining produces digestive juices. These create chemical reactions in the stomach breaking down and disolving its nurients. The Small Intestine's enzymes countinue the chemical reactions on the food.The nutrients are broken down small enough to pass through the lining of the small intestine and into the blood. Nutrients are carried away to the liver and other body parts to be processed stored and deliverd.The appendix's funtion is unknown. The Large Intestine, the useful substancesthat were not absorbed in the Small Intestine are absorbed through the walls of the Large Intestine into the blood.The Rectum and Anus are at the end of the Large intestine the Rectum stores the feces. The Pancreas like the Stomach makes digestive juices to help digest food.The Gall Bladder is a small bag like part under the liver. It stores bile which is made in the Liver. Liver, blood from the intestines carrying nutrients and vitamins and minerals it has 200 diffrent jobs.s (found in notes)

The Excretory Sysyem (The Uniary system)

The kidney's main role is to filter water soluble waste products from the blood resulting from the bodily funtions. They control the the flux of ions out of the bodu and conserve water. The nephron is where urine is formed and the composition of blood is regulated. They consist of glomerular capsule. The uteters are muscular tubules that link the kidney's bladder.The urethia extends from the neck of the lader to the exterior of the body and its final passageway that urine travels through before existing the body.The Bladder is composed of bands of three layers of interlaced smooth muscle, collectivly called the Detrusor muscle.(found in notes)

Respiratory System

The nose and mouth both brings air into the body. The nasial hairs trap dust. The nasial cavity warms and moistens air. Cila sweeo mucus and traped material to the back of the throat where it can be swallowed.The Pharynx is a tube like passageway used by food,liquid and air. At the lowerend of the pharynx is a flap of tossue called the epiglottus.The Larynx is commonly known as the voice box. The airway to which two pairs of horizontal folds of tissue called vocal cords are attahed.The tracea is a air conducting tube that connects with the larynx with the bronchi.The Bronchi is two short tubes that branch odd the lower end of the tracea cary air into the lungs.The bronchioles are tin branches of airtubes in the lungs conncect the bromchi to alveoli.The Alveoli is a tiny thin walled with grape like clusters at the end of bronchili.Surrounded by cappilaries. The diaphram is a muscle wall between the chest and the abdomen that the body uses for breathing.(kidsheath.org)

Circulatory Sysyem

Our circulatory system is a double circratroy cystem. This means it has 2 parts. The right side deals with deoxygenated blood. The left side deals with oxygenated blood. The Hear has 4 chambers. 2 Artias and 2 Venticles. Veins carry blood from the body exept the lung. Arteries carry blood away from the heart.Coranary artiries supply the heart with blood.The artieres carry blood away from the heart. The veins carry blood toward the heart.The capalaries link the artires with the veins.Red blood is a bincocale round and flat withoud a nucleus. White blood cells have many kinds and contain a big nucleus. The platelets are bits of cell broken off larger cells.Plasma a straw colered liquid that cerries the cells and the platelets which help blood clot.(in notes) Nervous System

The biggest part of the brian is the cereberum. The cereberum is where your memory lives both short and long term memory. The cerebum has 2 halves. The right side helps you think about things like colors and abstract things. The Left helps you think about math ect. The left side controls the left and the left half controls the right.The cerebellum consist of 2 deeply convolted hemishpheres. The funtion of the cerebellum is to cordinate body movements. If you damage your Cerebellum you could have a loss in motor skills or have very jerky movement.The Olfactory bulbs a structure of vertibrate forebraim involved om olfaction the perctipation of odors. It is on the inferior side of the brain.The Opric lobe is the visual prossesing center of the mamalian brain containg most of the anatomical region of the visual cortex.( Wikipedia ) Locomotion(Muscular and skeletal system) the axial consist of 80 bones along the central axis of the human body.The human skul beside the middle. The appendicular skeleton is composed of 126 bones on the ju,am body.Cartlage is a flexible connective tissue found in many areas in the bodies of humands and other animals including joints between the bones the ribcage and the ear.The skeletal muscle is a form of straited muscle tissue existing under control of the nervous system.Smooth muscle is an involurentary non straited muscle divided into subgroups. Cardiac muscle is a type of involurentary straited muscle founf in walls in histolgical foundation of the heart.Tendons a a tough band of fibers connective tisue that connects muscle to bone. (wikipedia)

Koala Digestive system

The koala bears have a oesophogus that humans do not have.They have a stomach which humans have.Koalas have a cecum which humans do not have.They have a small intestine which humans have. They have a colon a rectum and a anus which humans all have. Excretory system of the Koala bear

Koalas have Kidney's like the humans. They also have a uretha like the humans do! Respiratory system of a koala bears Koala bears are MAMMALS so they do breath using there nose and lungs and they have the same respiratory system as a human (answers.com)

Animal Background There spices is the arboreal herbivors marsuprial family of the masctide.They eat leaves the rest motinless for 16 to 18 hours a day and spend 3 to 5 hours eating.there life cycle for female maturity is at the age of 2 or at the age of 3. The male maturity is at 3 years of age to 4. a Healthy female koala can produce one young joey a year for 12 years. Twin koalas are very rare. Koalas are born hairless blind and ear less they crawl into a downward facing pouch they remain there for 6 months