Which of the following chambers has the thickest walls in the human heart? 

Which of the following contains deoxygenated blood in an adult human? 

When does the atria contract?

Which of the following tissue layer is found in all blood vessels?

What is correct about human red blood cells? 

When fibrinogen makes blood clot it separates from blood and the remainder is called

Trace the pathway of water from the soil through the plant to the atmosphere. 

Stomata close when the guard cells

In most plants the food is transported in the form of

The mineral in human food that is required in amounts less than 100 mg per day 

The dilated part of the alimentary canal, on the left of the abdomen, beneath the diaphragm

The secretion from the salivary glands; contains, water, mucous and amylase enzyme

The last part of the large intestine; opens out through the anus

The opening between the pyloric portion and the small intestine

The section of the alimentary canal after the oral cavity and before the esophagus 

The rhythmic sequence of waves of contraction in the smooth muscles of the walls of the alimentary canal, thus squeezing the food down along the alimentary canal. 

The inactive enzyme present in gastric juice; activated into pepsin by HCI 

The active form of enzyme pepsinogen that partially digests the proteins into shorter peptide chains 

The secretion of the pancreas that contains enzymes trypsin, pancreatic amylase, and lipase 

The gland that secretes pancreatic juice in the duodenum; also produces

The first part of the alimentary canal; the space behind the mouth 

The long tube (25 cm in an adult human) connects the pharynx with the stomach. 

Becoming over-weight; one reason is the intake of food that contains energy more than their requirement and very little physical work 

The process in which food is obtained or prepared, absorbed, and converted into body substances for growth and energy 

The elements and compounds that an organism obtains and use as an energy source or as components for the synthesis of new materials