3:they are usually microscopic
<span>Lactation is different between monotremes and therian mammals because monotremes are oviparous and have cloaca . Oviparous means they lay eggs, and generally animals that lay eggs do not nurse their young or lactate. Therian mammals give live birth, these are the animals that use breast milk to nurse their young.</span>
Answer:
The correct answer will be- Elevation
Explanation:
The movement of the muscles attached to the skeleton system allows the movement of the body parts.
The motion of the body parts like joints, limbs, organs are represented by the specific terminologies in which the movement of the scapula towards the head is known as the "Elevation". The elevation represents the superior movement of the body parts.
Thus, Elevation is the correct answer.
The esophagus squeezes food down the digestive tract by an involuntary synchronized muscle movement called the Peristalsis
