Rat Dissection

In this experiment, the external and internal structures of a sheep’s heart was examined and identified by dissection. To determine the functionality of a human heart since they are both mammals.

4) List the 11 organ systems of the body, identify their components, and briefly explain the major functions of each

3. Name the structure that is a double fold of peritoneum and holds the small intestine to the

The esophagus receives food from the mouth after swallowing and then delivers it to the stomach. The stomach holds food which it is being mixed with enzymes which continue the process of breaking down the food into a useable form. When the contents of the stomach are processed they are released into the small intestine. In the small intestine food is broken down by enzymes released from the pancreas and bile from the liver, the food is moved through and mixed with digestive secretions. The small intestine is made up of three segments the duodenum, jejunum and the ileum, the jejunum and the ileum are mainly responsible from the absorption of nutrients in to the bloodstream. These contents start out semi-solid and end in a liquid form after passing through the organ. Water, bile, enzymes and mucous change its consistency, one the nutrients have been absorbed it then moves onto the large intestine. The large intestine connects to the rectum and is specialised in processing water so that emptying the bowels is easy.

Explain what they are, their functions and where they are found. Then go into detail about two organs, with their functions, what tissues they are made of and where they are found in the body.

2. Can you draw a diagram that shows how the respiratory system, under the control of the central

　　　　What organs are found in the body that rats have in common too? Of course, human organs are bigger than a rat. A rat’s body is tiny compared to the human body. What are those labeled organs are? The rat has a heart like any animal or human has. The heart pumps blood to circulate throughout the body. The rat has a heart in them too and with the same function as well. Rats have a heart so that they could have the blood circulated throughout their

14. What do your heart block experiment results indicate about the spread of impulses from the atria to the ventricles?

In a sweeping fashion, the right atrium contracts and forces the final volume of blood into the right ventricle. The left atrium contracts and contributes the final 20% of volume to the left ventricle.

DIAPHRAM: Medial area of the rat, separating the thoracic cavity from the abdominal cavity. It was tan in color, thin, sturdy, but still quite

The topic I will be discussing about is the body cavities, it is a space which is considered our insides that contains our organs and fluids. We as humans have four body cavities (1) the cranial, (2) the thoracic, (3) the abdominal and (4) the pelvic cavity, they all contain one or more of our organs. Now let's get more depth with the cavities individually, let's start with the cranial cavity, it is inside the cranium its what protects the brain and its soft tissue, the cranial cavity is surrounded in a thin layer of cells. The thoracic or chest cavity houses the oesophagus, aorta, lungs, heart, and trachea, it is also subdivided into small sections the pleural is where each lung is and the mediastinum it surrounds the heart, veins, and arteries.

The Liver is the body's largest gland, weighing about three to four pounds. It is located beneath the diaphragm in the right upper quadrant (RUQ) of the abdominal cavity. Without the liver, our bodies would be poisoned and unfit for us to do anything at all. It is a metabolically active organ responsible for many vital life functions. The primary functions of the liver are: Bile productions and excretion. Excretion of bilirubin, cholesterol, hormones, and drugs. Metabolism of fats, proteins, and carbohydrates. Enzyme activation. Storage of glycogen, vitamins, and minerals. Synthesis of plasma proteins, such as albumin, and clotting factors. And blood detoxification and purification.

For the cat lab, there is no hypothesis as this is a observational activity. The purpose of this lab is to compare the anatomy and physiology of a Domestic House Cat, to that of a human. The references are “New” Lab manual, and Disecction of the Cat. The scale of refrence is one bar = 3mm.

Function: the stomach is shaped so that it can temporarily expand to store the food. It physically breaks down the food with the stomach muscles. It also chemically breaks down the food with the chemical, hydrochloric acid. The enzyme pepsin is reliable for protein breakdown in the stomach.

5. In which of the following the heart is less specialized having no partitions and absence of spiral valves from conus? a) Protopterus b) Lepidosiren c) Neoceratodus d) None 6. A single lung is present in: a)