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
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
If this never happened then our working muscles would easily become fatigue because it doesn’t have enough oxygen and it wouldn’t get rid of carbon dioxide and if it is removed from our body then this would mean our blood would become acidic and this would have an effect on our energy systems w...
All living cells need oxygen in order to carry out their various functions. These functions stop quickly if the supply
Blood serves as the body transport system; blood carries oxygen to the lungs and cells throughout the body. It takes carbon dioxide or toxins from out the body. The components of the blood fight off different diseases by recognizing engulfing microorganisms and molecules from overseas that doctors found in the blood. The other components support the transports through the kidneys, hormones in the body, and the digestive system to help pass the nutrients through the body.
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
side of the heart pumps oxygen-poor blood from the cells of the body back to the
The respiratory system is a complex organ structure of the human body anatomy, and the primary purpose of this system is to supply the blood with oxygen in order for the blood vessels to carry the precious gaseous element to all parts of the body to accomplish cell respiration. The respiratory system completes this important function of breathing throughout inspiration. In the breathing process inhaling oxygen is essential for cells to metabolize nutrients and carry out some other tasks, but it must occur simultaneously with exhaling when the carbon dioxide is excreted, this exchange of gases is the respiratory system's means of getting oxygen to the blood (McGowan, Jefferies & Turley, 2004).
In order for the cells of the body to work correctly they require a constant stream of oxygen in order to stay alive. The respiratory system provides the cells with oxygen while simultaneously removing carbon dioxide. The three parts of the respiratory system: the airway, the lungs, and the muscles of respiration.
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...
There are four important chambers that are inside of the heart and play important roles in the circulation of blood: Right/ Left Atrium and Right/ Left Ventricles. The superior half of the heart, both atriums, are thin walled receiving chambers for blood returning to the heart. Both ventricles, inferior half, eject blood into the arteries and keep it flowing throughout the body. It is essential that blood flows in the correct direction through the heart so there are a number of valves needed. The tricuspid valve separates the right atrium from the right ventricle and the pulmonary valve divides the right ventricle from the pulmonary artery. The bicuspid valve separates the left atrium from the left ventricle, and the aortia valve separates distinguishes the left ventricle from the ascending aorta (The S...
Everyone knows that the heart is a vital organ and we cannot live without it. It is complex and important; therefore it is critical to know how it works. With knowledge about the heart and what is good and bad for it, one can significantly decrease the risk for diseases. Now, the heart has three layers. Endocardium is the smooth inside lining, myocardium id is the middle layer of heart muscle, and it is surrounded by a fluid filled sac called the pericardium. The heart is split into four parts; some may call it chamber or rooms. These parts are the: right atrium, the left atrium, the right ventricle, and the left ventricle. The chambers are separated by partition walls known as the septum and each has a one-way valve that prevents blood from flowing backwards.
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
...ts duty of delivering oxygen to the tissues and returning the carbon dioxide from the tissues to the lungs. The red blood cell does this by circulating through the body’s network of veins, capillary networks and arteries. The erythrocyte membrane functions to allow the cell to squeeze, deform and reform through these networks while maintaining pressure and concentration differences and contributes to the overall metabolic homeostasis of the body. The red blood cell unique composition contributes to all of the membranes major functions, which again allows the red blood cell to survive and perform its duty.
the body and a point of attachment for muscles. oxygen and other gases, such as carbon
Oxygen (O) is one of the most important ions present in the body, making up 61% of the body’s mass. It aids in the destruction of harmful bacteria, while preserving the bacteria that is beneficial for the body. Oxygen takes on its role, and transfers the bacteria absorbed into the lungs, to the cells, allowing for cell respiration. Oxygen allows for the replacement of old cells, protection of the new ones, production of energy from the food, and decomposition of other foods (“Oxygen and Human Body,” n.d.). Oxygen is also vital to produce an activity known as metabolism, which is ‘the sum of the physical and chemical processes in an organism by which its material substance is ...