Nutrients build and repair body structures and are also transformed into:

Extracellular digestion takes place inside:

Mixed digestion is typical of:

The organule of the cell that uses the oxygen to extract nutrients is the:

Cutaneous respiration takes place through

Branchial respiration is typical of fish, molluscs, crustaceans and…

In annelids and vertebrates, the circulatory liquid is called:

In echinoderms, the circulatory liquid is called:

Veins carry blood...

Our circulatory system is

The main waste products are carbon dioxide, urea, uric acid, ammonia, mineral salts and…

The organ(s) that filter(s) blood to eliminate waste and keep useful substances is:

The organs that produce responses to stimuli are called:

The two systems for coordinating and regulating the animal’s functions are:

The nervous system consist on specialized cells called

All invertebrates have a nervous system, except:

The brain and the spinal cord are part of:

The exoskeleton is typical of:

The new individuals produced by reproduction are called:

When an extension grows from the body of the progenitor and develops into a new individual, the process is called:

The physical differences between males and females in species with separates sexes are called:

Embryonic development refers to the processes that take place from the formation of the zygote to the:

When the offspring are similar in appearance to the adult, the post-embryonic development is