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Bio unit 4 lesson 6.docx

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Ryerson University
BLG 311
Mc Grey

T h e Independent Activity Unit # 4 Lesson 6 T 1. h What is the function of the umbilical cord? s Theeumbilical cord is a flexible cord-like structure, which connects the fetus pig (at the naval) with the planenta. The placenta is a pancake-shaped organ that is attached to the inside of the mother's uterus. TheUumbilical cord contains arteries and veins which deliver nutrient rich blood, and oxygen to the babe. The umbilical cord also removes carbon dioxide, along with any other wastes that the baby pig produces while in the womb. Without this cord, the baby could not survive. b s 2. l State the function of the following organs: stomach, liver, small intestine, gall i blacder, pancreas, large intestine, and spleen. Stoaach– responsible for storing food and prepares for digestion Livar– metabolizes many drugs (including alcohol) and makes a substance similar to detergent for the digestion of fat called bile Small Intestine– the first part of the small intestine is duodenum, it is a major location for food c digastion; the second and third part are called the jejunum and ileum, here further digestion occurs andrnutrients are absorbed Gald bladder– collects bile, which is sent to the initial portion of the small intestine (duodenum) via the cystic and common bile ducts Pan-reas– pancreas makes digestive enzymes, which are carried by the pancreatic duct to the c duoaenum. The pancreas also makes the hormone insulin, which promotes sugar uptake from blood Large intestine– the large intestine reabsorbs water from digested food and the remaining undigested material is sent to the rectum Spleen– involved with maturation and processing of immune cells that protect the body. Spleen filters blood, removes old or damaged platelets and red blood cells, stores blood, and forms some types of f while blood cells v 3. e What is the function of the mesentery? s Mesintery are thin sheets of tissue that hold the small intestine in place; it holds mainly the jejunum andaileum. A large number of blood vessels are present within the mesentery which nourish the small intestine by providing it with a blood supply. If the mesentery was not present, the small intestine could kink up, or fold up and cause a blockage of food, similar to a bend in a water hose. s c 4. e Why does the left ventricle contain more muscle than the right ventricle? Therright ventricle only pumps deoxygenated blood to the lungs through the pulmonary arteries. Wheeeas, the left ventricle pumps oxygenated blood to the entire body via the aorta. The entire body is very large when compared to just the lungs. Not only does the left ventricle pump larger amounts of l oxyienated blood to the entire body, it must excel at doing this at an exceptionally fast rate, so the blokd can be transported to
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