Pectinate muscles are parallel ridges in the walls of the atria of the heart. The name is due to their resemblance to the teeth of a comb (pecten). The heart is the organ pumps blood to all parts of the body. It is made up of four chambers, that is, right and left ventricles, left and right atria, and the blood vessels, Pulmonary artery, pulmonary vein, aorta, and venacava. An auricles are pouch like structure that increase the total filling capacity of the atrium and also increase the volume of blood that an atrium is able to contain.
Well, A humans brain is bigger than a Sheeps brain, And a human has more Ridges and Contours also, Hope this helps
A eukaryotic cell has a plasmamembrane<span>, </span>cytoplasm, and ribosomes. eukaryotic cells have: amembrane<span>-bound nucleus. numerous </span>membrane<span>-bound organelles (including the endoplasmic reticulum, Golgi apparatus, chloroplasts, and mitochondria)</span>
Answer : A
Explain: succession is progressive changes and food web isn’t this example.
