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The Leatherback Turtle and Humans: How They Compare
Transcript of The Leatherback Turtle and Humans: How They Compare
The leatherback turtles' excretory system clears its body and blood of waste.
The kidneys filter the blood and send the wastes to the bladder, to then be released from the body as urine.
On thing that is really nifty about their kidneys is it is aided by a slat gland, which pulls excess salt from the sea water out of the turtle's body.
From bladder, the urine exits the body through the cloaca.
The cloaca also takes in oxygen and other nutrients.
By Chelsea Bitter and Olivia Heim
The Leatherback Turtle and Humans: How They Compare
Leatherback Sea Turtles are thermoregulators, meaning that they can adapt their circulation to maintain a stable body temperature.They can also transfer heat, back and forth, between the capillaries small veins and arteries to regulate temperature in vital areas. They can also regulate their heart rate to conserve oxygen.
The blood also helps to carry oxygen and nutrients throughout the body.
Humans are also thermoregulators as the circulatory system helps to maintain body temperature, and more importantly deliver and transport important nutrients and oxygen throughout the body.
Female Leatherback turtles, like other turtles, lay eggs after internal fertilization.
Fertilization happens in the oviducts in the female turtle, some species are able to store sperm in the oviducts for years.
All turtles need oxygen!
Besides the mouth and pharynx, sea turtles also use their cloaca to intake oxygen. The cloaca is extremely important for low oxygen levels, such as when deep diving.
Sea turtle lungs are designed in the exact same format as humans. The trachea, is also like that of a humans as it is a long hollow tube that splits in to two bronchus tubes, each of which leads to a lung.
Leatherback Turtles have special adaptations: they can adjust their breathing rate to help them recover faster after diving and to help them be more efficient with their oxygen supply, and they have more red blood cells that carry oxygen so they can hold more.
Turtle Digestive System
The route of the human digestive system begins in the mouth which mechanically and chemically breaks down food.
Then the bolus moves through the esophagus to the stomach, which then uses acid to further break down food.
The bolus moves through the small intestine into the large intestine, which absorb the needed nutrients for the body to function.
The waste is carried to the rectum where it is expelled from the body.
The liver produces bile, which breaks up fat. It also detoxifies the body.
The gallbladder stores and concentrates the bile created by the liver.
The pancreas produces enzymes, which are secreted into the small intestine to help further break down carbohydrates, proteins, and fat.
Humans also perform internal fertilization.
Females have eggs, produced in the ovaries, and during intercourse sperm from a male's penis, produced in the testicles, "pollinates" the egg if it is near the end of the Fallopian tube. The egg then moves down into the uterus to grow, if fertilized.
Double Loop System:
this system is called "double loop" because it consists of two blood circulations, one being oxygen rich and the other being oxygen deficient. Oxygen rich blood is transported through the arteries while oxygen deficient is in the veins.
Blood Flow in the Heart:
Blood from veins enters superior and inferior vena cava, it then flows to the right atrium, where contractions moves the blood through the tricuspid valve into the right ventricle. From there the blood is moved to through the pulmonary valve and artery to the lungs where it is reoxygenated. Once oxygenated it goes to through the pulmonary veins to the left atrium, where it contracts sending it through the mitral valve into the left ventricle. It is from there that the blood is pumped into the aorta, which it the main artery of the body.
The human excretory system has the same function as the leatherback turtle's.
The kidneys filter the blood, balance the body's fluids and electrolytes, and then removes the waste which is sent through the ureters to the bladder.
The ureters are tubes in which the wastes from the kidneys pass through to reach the bladder.
The bladder stores the urine until it is ready to exit the body.
The urethra is the tube in which urine flows out of the body.
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