Answer:
The three-chambered hearts of amphibians and nonbird reptiles are facultative, allowing variation in blood flow through the heart.
Explanation:
In Anatomy, cardiac cycle can be defined as a complete heartbeat of the human heart which comprises of sequential alternating contraction and relaxation of the atria and ventricles, therefore causing blood to flow unidirectionally (one direction) throughout the human body.
Generally, the cardiac cycle occurs in two (2) stages;
I. Diastole : in this stage, the ventricles is relaxed and would be filled with blood.
II. Systole: at this stage, the muscles contracts and thus, allow blood to be pushed through the atria.
All amphibians and reptiles except for crocodiles (having four-chambered heart) have three-chambered hearts, which typically comprises of a partially divided ventricle and two atria.
Hence, the correct statement about the three-chambered hearts of amphibians and nonbird reptiles is that, the three-chambered hearts of amphibians and nonbird reptiles are facultative, allowing variation in blood flow through the heart due to the partially divided ventricle.
I don't know what the picture is but I had a question like this on my packet and I saw a <span>sugar with two, and not three, oxygen atoms</span>
Answer:
1. Medial collateral ligament, lateral collateral ligament, anterior cruciate ligament and posterior cruciate ligaments.
2. Chondromalacia patellae
Explanation:
The knee is a ginglymus that connects the thigh to the leg. It is the largest joint in the human body, that plays a vital role in the horizantal and the vertical movement of the body.
There are <u>four ligaments</u> of knee joint, that joins the femur to the tibia and also provides stability by limiting movement. They are: <u>medial collateral ligament, lateral collateral ligament, anterior cruciate ligament and posterior cruciate ligaments.</u>
Chondromalacia patellae is a medical condition that includes inflammation of the cartilage on the posterior aspect of the patella, which leads to softening of the cartilage.
Answer:
Im doing this but I was honestly looking for a cheat sheet lol
