Sheep Heart Dissection
Aim: To investigate the heart of a sheep i.e. to investigate the
internal and external structure of the heart.
Hypothesis: The heart of the sheep and of a human will be the same
except for the size i.e. the sheep heart will be bigger.
Background information: The central organ of the Cardiovascular System
is the Heart, the muscular organ pumps blood through an intricate
network of Blood Vessels to all parts of the body. The Heart Beats
more than 2.5 billion times in an average life span. Yet this organ
that does so much work, and never rests, is no larger than the size of
a fist. The Heart lies within the Thoracic Cavity behind the Sternum
and between the two lungs.
The heart muscle is special because of what it does. The heart sends
blood around the body. The blood provides the body with the oxygen and
nutrients it needs. It also carries away the waste that the body has
to dispose of.
The left side of the heart sends blood to the body. This blood has
lots of oxygen in it (coming from the lungs), and the oxygen is one of
the things that the cells need to stay alive. The body takes the
oxygen out of the blood and uses it in the body's cells. The cells use
the oxygen, making carbon dioxide and other waste, and dump the carbon
dioxide and wastes back into the blood to be carried away. The blood
does this and takes the deoxygenated i.e. the carbon dioxide and waste
products + blood back.
The heart is made up of four different blood-filled areas, and each of
these areas is called a chamber. There are two chambers on each side
of the heart: one chamber is on the top and one chamber is on the
bottom. The two chambers on top are called the atria (plural). The
atria are the chambers that fill with the blood returning to the heart
from the body and lungs. The two chambers on the bottom are called the
Furthermore, Aristotle and Galen’s theories contributed to the Renaissance revival of heart anatomy. This reawakening made it possible for physicians to indicate the basic arrangement of the heart. It became commonly accepted that the heart was divided into four parts: two ventricles (lower chambers that pump blood out) and two auricles (upper chamber that r...
In Joseph Addison’s “The Dissection of a Coquette’s Heart,” he satirizes the frivolous personality of some young women at the time of the article’s publication. The heart of the coquette contains two distinct areas: the pericardium, or outward case, guarding what ultimately lies in the midst of her heart, her only love.
Red blood cells deliver the oxygen to the muscles and organs of the body.
According to Virtual Medical Centre (2014) the primary function of the blood is to act as a transport, to give the body protection and to help regulate. The blood dissolves gases such as oxygen and carbon dioxide. The blood also transports vital nutrients throughout the body, such as micro-nutrients, fatty acids and amino acids. The flow of the blood helps to regulate the body’s temperature. Also the blood removes wastes material of metabolism. Blood cells (white and red cells) are carried through the body to help with the body’s natural defense, blood clotting and the carry anti-bodies.
divide to make new blood cells. Once blood cells mature, they leave the bone marrow and enter
Therefore, when studying the cow heart I observed whether it had all the components Harvey identifies; and it did. Although, because the cow heart did not come with the lungs attach it was a bit difficult to find these pulmonary artery and vein, but previously having found them in the sheep heart it gave me direction to where they might be. Once I located all of the valves I began to make my incision into the muscle of the
When your heart beats, the first beat represents the AV valves closing to prevent the backflow of blood into the atrium. The second beat is the semilunar valves opening to allow blood into the aorta or pulmonary trunk.
The heart serves as a powerful function in the human body through two main jobs. It pumps oxygen-rich blood throughout the body and “blood vessels called coronary arteries that carry oxygenated blood straight into the heart muscle” (Katzenstein and Pinã, 2). There are four chambers and valves inside the heart that “help regulate the flow of blood as it travels through the heart’s chambers and out to the lungs and body” (Katzenstein Pinã, 2). Within the heart there is the upper chamber known as the atrium (atria) and the lower chamber known as the ventricles. “The atrium receive blood from the lu...
...h research that the Crux of the heart is the area of the junction of the walls of the four chambers of the heart. This was a truly "Ressler" observation, Ressler is the only man I know that could use his mind that is set in genetics and biology and apply it to a spiritual song and come out right. The research that I came up with also triggered a variation of the four chambers of the heart.
The circulatory system and respiratory system share a highly important relationship that is crucial to maintaining the life of an organism. In order for bodily processes to be performed, energy to be created, and homeostasis to be maintained, the exchange of oxygen from the external environment to the intracellular environment is performed by the relationship of these two systems. Starting at the heart, deoxygenated/carbon-dioxide (CO2)-rich blood is moved in through the superior and inferior vena cava into the right atrium, then into the right ventricle when the heart is relaxed. As the heart contracts, the deoxygenated blood is pumped through the pulmonary arteries to capillaries in the lungs. As the organism breathes and intakes oxygenated air, oxygen is exchanged with CO2 in the blood at the capillaries. As the organism breathes out, it expels the CO2 into the external environment. For the blood in the capillaries, it is then moved into pulmonary veins and make
The heart is two sided and has four chambers and is mostly made up of muscle. The heart’s muscles are different from other muscles in the body because the heart’s muscles cannot become tired, so the muscle is always expanding and contacting. The heart usually beats between 60 and 100 beats per minute. In the right side of the heart, there is low pressure and its job is to send red blood cells. Blood enters the right heart through a chamber which is called right atrium. The right atrium is another word for entry room. Since the atrium is located above the right ventricle, a mixture of gravity and a squeeze pushes tricuspid valve into the right ventricle. The tricuspid is made up of three things that allow blood to travel from top to bottom in the heart but closes to prevent the blood from backing up in the right atrium.
It is about the size of a person's fist. The heart has four chambers. The upper two chambers are the right artium and left atrium, and the lower two are the right ventricle and left ventricle. Blood is pumped through the chambers, aided by four heart valves. The valves open and close to let the blood flow in only one direction.
The heart is a pump with four chambers made of their own special muscle called cardiac muscle. Its interwoven muscle fibers enable the heart to contract or squeeze together automatically (Colombo 7). It’s about the same size of a fist and weighs some where around two hundred fifty to three hundred fifty grams (Marieb 432). The size of the heart depends on a person’s height and size. The heart wall is enclosed in three layers: superficial epicardium, middle epicardium, and deep epicardium. It is then enclosed in a double-walled sac called the Pericardium. The terms Systole and Diastole refer respectively and literally to the contraction and relaxation periods of heart activity (Marieb 432). While the doctor is taking a patient’s blood pressure, he listens for the contractions and relaxations of the heart. He also listens for them to make sure that they are going in a single rhythm, to make sure that there are no arrhythmias or complications. The heart muscle does not depend on the nervous system. If the nervous s...
I value an education, it is a vital tool to succeed and survived in very competitive world. I strongly believed that learning and knowledge are highly prized in all societies. In the process of enriching myself I have experience many proud moments. One of them is pig’s brain dissection in my AP Biology Lab. I am always curious to know and see complex brain’s anatomical internal structure. The day I performed the dissection I was thrilled as it was not only satisfying my hunger of learning, but also a first step toward my career goal. Today, again I got chance to dissect a strawberry. The entire process to separate strand of DNA was very interesting and observing DNA was the most fascinating work for me. I still remember my 9th
The transport system in our body that carries blood is known as the circulatory system. This system allows the blood to carry essential nutrients such as amino acids, oxygen, and hormones to the cells in all parts of our body to ensure they are able to maintain body temperature and pH known as homeostasis. The oxygen-rich blood enables cellular respiration to occur efficiently which is vital for humans to continue to survive. It also carries cellular waste such as carbon dioxide which is not needed by the body back to the lungs and out to the environment during exhalation. Blood consists of red blood cell to transport oxygen to cells in our body, white blood cell to combat diseases and pathogens, platelets to stop bleeding, and