Biology Questions

The left atrium is the upper left chamber of the heart that receives blood from the pulmonary veins.

The heart is responsible for circulating blood throughout the body. The heart is divided into four chambers. The upper chamber is known as the atrium while the lower chamber is referred to as the ventricle.

Nucleus serves as the control center for cell metabolism and reproduction.

Decomposers are organisms that break down dead or decaying organisms, and in doing so, they carry out the natural process of decomposition.

The statement "Decomposers are those organisms that recycle matter in the ecosystem" describes decomposers.

The small intestine is the main area of the GI tract for absorption.

The small intestine has three separate sections. Theyare :

1. The duodenum

2. Jejunum and

3. Ileum.

Hence, the majority of nutrient absorption occurs in the duodenum and jejunum of small intestine.

In the adult heart, blood in the right chambers of the heart cannot enter the left chambers without passing through the lungs is correct regarding mammalian heart.