Heart: Is the pumping organ and has three chambers.Anterior Vena Cava: A large vein that carries blood from the posterior part of the body towards the heart. Posterior vena cava: A big vein that move blood from the posterior part of the body in direction of the heart. Sinus venosus: A sac that receives blood from the vena cava.Right atrium: Chamber in the frog’s heart that receives blood from the sinus venosus.Left atrium: The chamber of the frog’s heart that gets blood from the lungs.Pulmonary veins: carries blood from the lungs to the left atrium.Ventricle: A Chamber that pumps blood out of the heart to the lungs and then other parts of the body.Truncus arteriosus: Large artery that carries blood away from the ventricle that then leads to all over the body.Respiratory:Glottis: Opening from the mouth to the respiratory system.External nares: anterior openings for air to exit and enter.Lungs: Takes air through the nostrils down into the lungs.Esophagus: Connects the mouth and stomach of the frog.Anatomical system DescriptionsSkeletal:The three leg bones in the rat are the femur, tibia, and fibula. The femur has a small patella(kneecap) like most mammals do. If you look closely into the leg of a rat you can see the ligaments that attach bone to bone. The skeletal system of the rat is similar to most mammals.Muscular:Biceps brachii: Located on the surface of the humerus, and used for flexing arm.Biceps femoris: Located on the side of the thigh in two bundles of muscle, and it is used to flex the lower leg.External Oblique: Located on the side of the abdomen, used to flex body wall.Pectoralis: Located on the chest region, and is used to draw arms forward.Reproductive:Ovaries: The female reproductive organs are called the ovaries, witch are connected to the uterine horn.Testes: The males reproductive organs are called testes, and our located in the scrotal sac.Digestive:Liver: The liver is a dark colored organ witch is suspended under the diaphragm. The liver’s main purpose is to store glycogen, and transform waste into a less harmful substance.Esophagus: The esophagus runs through the diaphragm, and moves food from the mouth to the stomach.Stomach: Located right under the liver and the function of the stomach include:Physical breakdown of food, food storage, and the digestion of protein.Small intestine: A tube that receives partially digested food from the stomach.Large intestine: Is a large tube that goes from the small intestine then to the anus.Cecum: Is a pouch that connects to the small and large intestines. This is where food gets temporarily stored here.Cardiovascular:Pulmonary Circuit: Transfers the oxygen-depleted blood to the lungs to then pick up oxygen and drop off carbon dioxide.Systemic Circuit: sends oxygenated blood and nutrients to all over the body to each cell and also removes waste.Pericardium: covers the enclosed part of the heart and the proximal ends of the large blood vessels to where it attaches.Aorta: The main artery of the body that supplies oxygenated blood.Atrium: Main two chambers of the heart that receive blood that is returning to the heart.Ventricle: receives blood from the atria and contracts to then force blood out of the heart into the arteries.Respiratory-Lungs: A large organ that passes blood and air through it and also removes co2 from blood and adding oxygen to it.Diaphragm: a muscle that is between the thorax and the abdomen. The diaphragm increases the volume of the thorax inflating the lungs.