Which structure or substance is responsible for filter and clean air as it passes through the trachea and bronchioles? a. cilia b. saliva c. nasal passages d. alveoli

A

Explanation:

because the cilia is in the trachea and it pushes foreign things out as it breathe in air and it pushes out things such as dust and all that

Cilia

Explanation: Respiration can be defined as the phenomenon in which the   exchange of gases takes place between the lungs and outer environment.

The process by which the air is inhaled is known as inhalation and the process y which carbon dioxide is moved out of the body is known as expiration.

The whole of the respiratory track is ciliated that protects the nasal passage by the entrance of the harmful pathogens, dirt and foreign particles. It propels out the foreign particles out of the body by the back and forth movement.

the abdomen (less formally called the belly, stomach, tummy or midriff) constitutes the part of the body between the thorax (chest) and pelvis, in humans and in other vertebrates. the region occupied by the abdomen is termed the abdominal cavity. the stomach secretes acid and enzymes that digest food. ridges of muscle tissue called rugae line the stomach. the stomach muscles contract periodically, churning food to enhance digestion. the pyloric sphincter is a muscular valve that opens to allow food to pass from the stomach to the small intestine.

hey bro i looked it up on google the structure of the eye-spot in euglena viridie, e. ehrenbergii, and phacus pyriyorme is not as franzé haa described it. the so-called “crystal body” and “lens bodies” were not found in any of the individuals of the species examined by me. as earlier observers have stated, the eye-spot consists simply of a mass of pigment granules arranged in a single layer, and probably embedded in a protoplasmic framework, but the latter could not be seen, and its presence was only inferred from the fact that the pigment granules must be held together in some way, thd the eye-spot as a whole is capable of expansion, and that the pigment granules can be separated from each other.

hope this   and an i get brainlsiest