Pig Dissection: The Beginning

Here you can see the rump of the pig and you can see the anus, where waste exits the body.

Pig Dissection: The Mouth

Here is a picture of the inside of the pig's mouth. You can see the glottis, which prevents food from entering the trachea and allows food to continue down the esophagus. The glottis is a piece of cartilage that covers the trachea when food enters the mouth.

Pig Dissection: The Beginning

Here is the pig before it was dissected. You can see the skin and the umbilical cord. The skin protects the inner organs from becoming damaged and the umbilical cord provides nutrients from the mother to the fetus while it is still growing and maturing.

Pig Dissection: Nerves

Here is a nerve, under the skin of the pig and it is used to send impulses to the body, so the body can perform its functions correctly.

Pig Dissection: Spine

Here is a part of the spine from the pig. This part of the spine connected to the ribs and had nerves around it to send impulses throughout the body. The spine is essential to the structure of the body and helps the body maintain its function.

Pig Dissection: Nervous System

This is the pig's brain. You can tell in this picture that the pig had a blood clot in the brain and could and the blood was not flowing correctly throughout the brain. The brain controls the bodily functions and controls the senses. The brain has many parts and has two hemispheres. Each hemisphere controls a side of the body. The brain also sends out signals, neurons, to the body to perform tasks.

Pig Dissection: Reproductive System

In this picture, we are trying to show the uterus, vagina, cervix, and ovaries of the pig. You can see the ovary and the Fallopian Tubes but you cannot see the uterus, vagina, and cervix because they are underneath and not accessible to  us. The ovaries hold the follicles and eggs made by the pig. The Fallopian tubes lead into the vagina. The cervix is what leads to the vagina and opens when there is shedding of the lining of the uterus.

Pig Disection: Excretory System

 Here you can see the urethra and  the bladder. The urethra joins to the vagina in our pig and forms the vaginal vestibule. The vaginal vestibule leads out of the body, out of the urogenital opening and urea exits the body.

Pig Disection: Excretory System

In this picture you can see the ureter, which leads to the bladder so waste can exit the body. you will be able to see the bladder and the urethra in the next post.

Pig Disection: Excretory System

Here is the kidney, it is cut open horizontally so that we can see the inside of it. Inside of the kidney we can see renal artery (looks pink), the renal vein, renal cortex, renal pyramids, renal pelvis, renal medulla, and the ureter exits the kidney and leads to the urinary bladder. Also inside of the kidney are small blood vessels called microscopic tubules. There are also nephrons in the kidney which help to relay signals throughout the body. The kidneys help the body to clean out the waste and filter the body's blood so that it can be clean as it flows in the body.

Pig Disection: Excretory Systems

This picture shows abdominal cavity. Here you can see the kidneys mainly.

Pig Disection: Lungs

In this picture you can see the lungs of the pig. In the lungs there are arterioles and bronchioles with help with the exchange of oxygen and they also absorb the oxygen from the air. The air enters the lungs and then are led to bronchi and finally bronchioles.

Pig Disection: Circulatory System

In this picture you can see the heart, but the heart is cut open. Inside of the heart you can see the arteries and veins, which pump blood to and away from the heart. You can also see the left and right atrium. The veins help to perform the basic functions of the body.

In this picture you can see the left and right atriums. The atriums receive blood from the vena cava and pulmonary veins.

In this picture you can see the heart, whose main function is to pump blood throughout the body. The blue peice that is displayed on the heart is the vein that leads oxygen poor blood back into the heart. This is a coronary vein because it is a vein that is between the left and right ventricles and lying on the surface of the heart.

Here is a picure where you can see the esophagus and where the heart and lungs are. The lungs are covering the heart in this picture and it is hard to see, but it is there.

Pig Disection: Circulatory and Respiratory Systems

In this picture you can see the thyroid gland and the thymus glands. The thymus gland helps in the development and upkeep of the immune system. The thyroid gland secretes hormones that help in metabolism. Behind the thyroid gland is the trachea, which allows air to be brought to the lungs. Behind the trachea is the esophagus, which transports food from the mouth to the stomach.

Pig Disection: Circulatory and Respiratory Systems

Here is a picture of the opening of the thoracic cavity. We cut and opened up the thoracic cavity by cutting between the ribs and on one side of the sternum, the bone in the middle of the body that the ribs attach to. We are opening it up to see the lungs, heart, glands, and tissues. 

Here is a picture of the liver and trying to get the gallbladder in the picture also. The liver helps to detoxify the body and process nutrients. The gallbladder stores bile until it is needed to help digest food in the intestines.

In this picture you can see part of the large intestines or the colon. The colon reabsorbs water back into the body. The food passes through the colon and leads to the rectum, where the waste exits the body.

Pig Disection: Digestive System

Here is a picture of the inside of the stomach. On the inside of the stomach, there is gastric rugae. The gastric rugae allows the stomach to expand when it is filled with food.

Pig Disection: Digestive System

Here is a picture of the stomach and pancreas. the  bluish- gray part that is attached to the stomach is the pancreas. As food is passed from the stomach to the small intestines and goes through the duodenum, enzymes are released from the pancreas and crosses the duodenum wall and is released into the body to maintain blood glucose levels. The stomach (brownish- gray) The stomach is where the food is passed to from the esophagus. The stomach holds food and it releases enzymes to start breaking down food.

Pig Disection: Digestive System

Here is a picture of us looking in a microscope to try and see the villi and microvilli of the small intestines.

Pig Disection: Digestive System

This is a picture of the small intestines and the mesentery. The role of the small intestines in the pig is to absorb nutrients into the body to help the body grow. The duodenum is the part of the small intestines that connects the small intestines and the stomach. When the food leaves the stomach, it passes through the duodenum first and then enters the jejuno- ileum, the second part of the small intestines. Nutrients are absorbed in this part of the small intestines through villi and microvilli. Villi and microvilli are small fingerlike projections that increase surface area of absorption of nutrients.

Pig Disection: Digestive system

This is the general anatomy of the pig. Here you can see the stomach, the umbilical cord, and part of the small intestines.

Pig Disection: Digestive System

 

This is the beginning of the dissection starting with the digestive system! Here you can see part of the intestines.