Blood returning to the mammalian heart in a pulmonary veindrains first into the(A) left atrium.(B) right atrium.(C) left ventricle.(D) right ventricle.

Q: Give the function of the following in frog's circulatory system:   7.Aortic arch  8.Dorsal aorta…

A: “Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

Q: Does the fish heart pumpvenous or arterial blood?

A: Arterial blood is oxygen rich blood and venous blood is oxygen poor blood. Arterial vein is found in…

Q: What is a closed circulatorysystem?

A: A circulatory system facilitates the transport of molecules from one part of the body to another by…

Q: Distinguish between the coverings of the heart and thelayers that compose the wall of the heart.

A: The heart can be defined as the muscular organ about the size of a fist, which is situated just…

Q: High pressure in the systemic and pulmonary circuits often results in ventricular enlarges to pump…

A: PULMONARY CIRCUIT The blood pumped by right ventricles enters into the pulmonary artery The left…

Q: How are the circulatory systems of animals classified?

A: Circulatory system conducts a lot of work. The major functions of the circulatory system are as…

Q: Describe the process of Distribution of the total blood volume in differentparts of the circulatory…

A: Blood volume are the volume of blood present in the body circulatory system in form of RBC  (Red…

Q: Help please

A: Pigs like other mammals have a four-chambered heart. The right side of the heart pumps blood to the…

Q: pulmonary syste

A: introduction When blood goes through the pulmonic valve, it enters your lungs. This is known as the…

Q: Why do the cardiac muscles cells demonstrateautorhythmicity?

A: Autorhythmicity is a property of specialized cardiac cells called pace maker cells that directly…

Q: Describe, in humans, what becomes of the six pairs of aortic arches typical of vertebrate embryos?

A: Introduction :- In the embryo aortic arches develop in association with each of the developing…

Q: How many chambered heart does fish have?

A: Circulatory system is the system, that helps in the circulation of substances through body fluids.…

Q: Pathway of blood through the Human Circulatory System Trace the pathway of blood through the…

A: The heart is the muscular structure that pumps oxygenated blood to all parts of the body via a…

Q: Dh no! TA Tim accidentally wandered into a surgical ward and was put in charge of doing another…

A: This is a rare medical condition also when the heart is placed backwards or face towards the right…

Q: Give the aortic arches in Lamprey, Shark and Frog?

A: Aortic arches are also known as pharyngeal arch arteries. It refers to a series of 6 paired vascular…

Q: Differentiate between single and double circulation found in vertebrates.

A: All the vertebrates are having circulatory system which consist of central pump (heart) and a…

Q: Why is pulse rate faster in small and young animals compared to that in large and older animals?

A: Pulse rate is the measure of how many times the heart beats per a minute, normally heart beats…

Q: How many chambered heart does animals like amphibians and reptiles have?

A: Heart Heart is a blood pumping organ of vertebrate animals. The circulation of fluid into the body…

Q: Can humans live if they have 3 chambered hearts?

A: The heart is a muscular organ shaped like a fist, located at the back and slightly left of the…

Q: Thoracic Blood Vessels of the Fetal Pig Can you xxplain the structures/ or organs that each blood…

A: Like humans, pigs also belongs to mammals and have four-chambered heart located in the thoracic…

Q: What accounts for the physiological differences in the animal hearts?

A: The hollow mascular rhythmic organ of circulatory system which receives and palms blood to maintain…

Q: Relate the opening and closing of specific heart valves in each phase of the cardiac cycle to…

A: The highly coordinated sequence of electrical, mechanical, and vascular events constitutes the…

Q: Describe the structure of the heart of a mammal

A: The heart is a hollow muscular organ that pumps the blood through the circulatory system by rhythmic…

Q: The mammalian circulatory system includes a four- chambered heart and a double-loop circulation. How…

A: The circulatory system, also known as the cardiovascular or vascular system, is an organ system that…

Q: How many chambers dothe bird heart and themammalian heart have?Concerning temperaturemaintenance…

A: The circulatory system consists of the heart, blood vessels, capillaries, and blood. The heart is…

Q: Trace the flow of blood through a mammalian heart, naming the four chambers and their valves, and…

A: The heart is the most important organ in the body. It is made up of several different types of…

Q: euterostome Animals, p. 681 of our text). 4. What kind of circulatory system do herring have (be…

A: Heart is the main organ of the circulatory system. It pumps blood to all parts of the body thereby…

Q: What is the primary function of Circulatory system?

A: Circulatory system is a kind of transport system. It is also called as a blood vascular system.

Q: Discuss or diagram the path of blood flow through the heart, lungs, and body of a fish and that of a…

A: The physical appearance of both including fish and mammals are different from each other , so will…

Q: How many chambers doesthe fish heart have?

A: The system which is primarily meant for the circulation of substances through body fluids is called…

Q: Describe the nutrient and gas content of the blood flowing in the umbilical vein.  Is this the kind…

A: The umbilical vein is a vein that takes oxygenated blood from the placenta into the developing fetus…

Q: What are the advantages ofthe closed circulatory systemover the open circulatorysystem?

A: Simple organisms like sponges and coelenterates have mechanisms to circulate water of their…

Q: What are the main functions of the circulatory system?

A: The circulatory system (cardiovascular system) pumps blood from the heart to the lungs for oxygen.…

Q: In the cardiovascular dynamics experiment (part 2), if the left flow tube represents the pulmonary…

A: Cardiovascular system consists of heart and blood vessels that adapts to meet the demands the…

Q: Upon your return to the heart, you have that rare and wonderful chance every Adventurer and Hobbit…

A: The heart is the major pumping muscular organ of the circulatory system. It helps in pumping…

Q: How can you tell which side of the heart is the ventral surface (the surface closer to your chest)?…

A: We are authorized to answer only three sub-parts at a time, since you have not mentioned which part…

Q: Trace the pathway of the flow of blood into and through the human heart and lungs (including all…

A: HEART--Structure and anatomy--Heart is a muscular structure ,located under the ribs cage 2/3rd of…

Q: Why would a fourth chamber heart be evolutionarily advantageous to an animal?

A: Introduction:-  Birds and mammals, on the other hand, have a four-chambered heart with a fully…

Q: 18. Under the microscope, I can see a section through one of the chambers of the heart. The…

A: The heart is a vital organ which is a large, muscular organ that pumps blood filled with oxygen and…

Q: What are the major characteristics of veins and arteries as blood vessels in an animal circulatory…

A: Heart and blood vessels make up the circulatory system. The circulatory system's important job is to…

Q: How is Circulatory resistance approximated?

A: Blood is an important body fluid that maintains homeostasis in the internal environment. The human…

Q: How is the structural organization of the circulatory system related to the animal’s respiratory,…

A: The cardiovascular system is formed of three independent systems that may work together: the guts,…

Q: Tabulate the differences between shark and frog regarding the aortic arches and cranial nerves?

A: Shark are cartilaginous fish whereas  frogs are amphibians. Sharks have two chambered heart whereas…

Q: Anatomy-wise, how different is the circulatory system of the cat from that of other vertebrates?

A: The circulatory system of vertebrates is a complex network of blood vessels which transports blood…

Q: what circulatory System loops between the heart and the lungs?

A: The cardiovascular system is a circulatory system that helps to transport oxygen, nutrients,…

Q: Do fishes present an openor closed circulatory system?How many chambers does afish heart have? How…

A: Introduction: Fish belongs to  Pisces class of Phylum Chordata. It has a skin with scales covering…

Human Evolution

Human evolution is the process of evolution of humans from early man to anatomically modern humans. The process of evolution in humans leads to the gradual development of traits like bipedalism. Humans are the highly social animals that make them the most advanced animal on Earth.  Human evolution is an outcome of interaction among the following processes: