The urinary bladder is a muscular sac that stores urine produced by the kidneys before it is excreted from the body. In mammals, including humans and fetal pigs, the urinary bladder is located in the pelvis.
During fetal development, the urinary bladder begins to form around the third week of gestation. Initially, it is a small, simple sac-like structure that is connected to the developing kidneys by a pair of ureters. As the fetus grows and develops, the urinary bladder becomes more complex and begins to take on its characteristic shape.
In a fetal pig, the urinary bladder is located in the pelvic cavity, posterior to the pubic bones. It is a relatively small organ, measuring only a few centimeters in length and width. The walls of the urinary bladder are composed of smooth muscle tissue, which allows the bladder to contract and relax as it fills and empties.
The main function of the urinary bladder is to store urine produced by the kidneys until it is ready to be excreted from the body. Urine is produced when the kidneys filter waste products and excess fluids from the blood. The urine is then transported to the urinary bladder through the ureters, which are long tubes that connect the kidneys to the bladder.
As the urinary bladder fills with urine, the smooth muscle walls of the organ begin to stretch and expand. This stretching stimulates the bladder's stretch receptors, which send signals to the brain indicating the need to urinate. When the individual is ready to urinate, the muscles of the urinary bladder contract, expelling the urine through the urethra and out of the body.
In fetal pigs, as in humans, the urinary bladder is an important organ that plays a vital role in the body's ability to maintain homeostasis and eliminate waste products. Understanding the development and function of the urinary bladder can provide insight into the overall functioning of the urinary system and the body as a whole.
Histology & Anatomy of Fetal Pig
Shortly after birth, the ductus arteriosus closes and blood in the pulmonary artery goes to the lungs instead of the body. The epiglottis projects up through the soft palate into a region called the nasopharynx. The pancreas is located dorsal and posterior to the stomach. Respiratory System Observe how the diaphragm attaches to the body wall and separates the abdominal cavity from the lung pleural and heart pericardial cavities figure 16 and 18 below. Urethral prolapse occurs when the inner lining of the urethra protrudes through the opening of the urethra. Gene Gene name Description Tissue distribution mRNA tissue Tissue specificityscore Detected in some 74. The thyroid gland is darker and lies between the posterior ends of the two lobes of the thymus gland.
The abdominal aorta, renal arteries, and bladder excrete the waste to the outside of the fetal body. Accumulated urine will pass out of the bladder via the urethra. Other systems for naming the parts of the urethra have been described. Duodenum, gallbladder, liver, lungs, large intestine, pancreas, small intestine, stomach — The liver has been lifted to reveal the gallbladder. You should not remove these structures yet because you will need to identify the blood vessels later in the dissection. It also works with the digestive system making sure the food we swallow gets to the stomach safely. Table 1, Number of genes in the subdivided categories of elevated expression and tissue distribution in kidney Distribution in the 44 tissues Detected in single Detected in some Detected in many Detected in all Total Kidney enriched expression Genes classified as kidney enriched are well in line with the filtering fluid transport-related function of the kidney and it is very similar to the expression profile of the human kidney.
Where is the urinary bladder located in a fetal pig?
It extends along the length of the stomach from the left side of the body your right to the point where the stomach joins the small intestine. Large intestine, pancreas, small intestine, spleen, stomach. At the bottom region of the pig is where the umbilical artery and urinary bladder are located. The lungs are responsible for bringing oxygen to the body and filtering out carbon dioxide. Bladder Urine is stored in the urinary bladder, an expandable, muscular sac, until it is excreted from the body. How many parts are in the urinary bladder? The lower half of the pig contains the gall bladder, liver, stomach, large intestine, small intestine, spleen, and pancreas. Gene Gene name Description Tissue distribution mRNA tissue Tissue specificityscore sodium-dependent phosphate transport protein 2A Detected in single 193.
Circulatory System The diagrams below summarize the circulatory system of a mammal. These tubes widen and lead to the kidney; they are the connector from the kidneys to the bladder. Bulbourethral gland, spermatic cord, testis, urethra, urinary bladder, vas deferens. The bladder Figure 1A is located at the base of the pelvic floor superior to the reproductive organs and ventral to the rectum. The first branch of the aorta is the brachiocephalic artery. The pericardium is a membrane that surrounds the heart and lines the pericardial cavity. Find the bile duct that leads to the small intestine.
Description: The kidneys are located on the lumbar region of the body cavity, their main function is the production of urine and the filtering waste from blood, and balance body fluids. What is pig xenotransplantation? The pancreas is made up of the exocrine and endocrine gland that help break down carbs, fats, proteins, acids, and help regulate glucose in blood. An incision was made on the side of the neck to enable the injections. Below: esophagus, larynx, trachea, bronchus, lungs. Aorta, aortic arch, left atrium, brachiocephalic artery, ductus arteriorus, lung, pulmonary artery, pulmonary trunk, left subclavian artery. A similar cut is made on the other side.
Urine passes through the urethra. Where are the kidneys in a fetal pig? Penis, scrotum, urogenital opening Figure 13. The bladder is the same, but the urethra is not. If a structure is anterior to another then it is closer to the head. Blood vessels that branch from the aorta carry blood to most of the body.
Several different pig dissections were used to obtain the photographs below. The urethra is the duct through which urine is transported out of the body. How does urine flow from the kidney to the bladder? Urothelium also includes umbrella cells, polarized superficial cells with a distinct apical and basolateral membrane. Air and food pass through the oropharynx, a space in the posterior portion of the mouth. The hard palette forms the roof of the mouth and in doing so separates the oral and naval cavities. Path of urine flow.
The fetal pig that you will dissect has been injected with a colored latex rubber compound. It houses bacteria used to digest plant materials such as cellulose. Mouth and Neck Region Use a scalpel to cut the sides of the mouth so that the bottom jaw can be opened for easier viewing see the photograph below. Find the posterior part of the large intestine called the rectum and observe that it leads to the anus. Lift the right lobe and find the gallbladder. Where is the pancreas located in a pig? In the upper chest region of the pig there is the pericardial sac, lungs, trachea, larynx, heart, and diaphragm. From the top to bottom Urinary bladder The urinary bladder holds the urine produced by the kidneys, which is transported into the urinary bladder via the ureters into the bladder.
What is the thickness of the urinary bladder of the fetal pig?
The large hard structure attached to the trachea is the larynx. Aorta, colon large intestine , diaphragm, heart, kidney, lung, renal artery, posterior vena cava, renal vein, small intestine, spleen, stomach, ureter. Hard palate, soft palate, glottis, epiglottis, and tongue. The epiglottis projects up into a region called the pharynx. It contains a lubricating fluid and isolates the heart from body movements such as the expansion and contraction of the nearby pleural lung cavity.