We chew the food with our teeth and break it down mechanically into small pieces. Each tooth is rooted in a separate socket in the gums. Our teeth vary in appearance and perform different functions. From the above diagram identify which one is milk teeth (a) or (b). Justify your answer.
Important Questions on Nutrition in Animals
The digestive system is made up of the digestive tract and other organs that help the body break down and absorb food. The digestive system breaks down food into nutrients such as carbohydrates, fats and proteins. They can then be absorbed into the bloodstream so the body can use them for energy, growth and repair. Unused materials are discarded as faeces. The diagram below shows the human digestive system. Give the letters (not the name) of the following part.
Two parts where amylase is secreted and the part where hydrochloric acid is secreted.
Amoeba uses finger-like projections to capture food particles. The picture shows the first step of the process.
Identify from the options, which is the next and last steps of capturing food.
Amoeba is a microscopic single-celled organism found in pond water. It pushes out one, or more finger-like projections, called pseudopodia or false feet for movement and capture of food. Amoeba feeds on some microscopic organisms. When it senses food, it pushes out pseudopodia around the food particle and engulfs it. The food becomes trapped in a food vacuole.
It is said food vacuole in Amoeba is similar to the small intestine of human beings. Do you agree? Explain.
