A phenotype is a trait we can observe. Genes carry instructions, and the result of our body following those instructions (for example, making a pigment in our eyes), is a phenotypic trait, like eye color.
The medical term for expanding or opening wider is. apnea. the medical term for lack of or absence of breathing is. tissue. the medical term for groups of cells with the same function is. cell. the medical term for the basic unit of body structure is. menarche.
Breathing that stops from any cause is called apnea. Slowed breathing is called bradypnea. Labored or difficult breathing is known as dyspnea. Apnea can come and go and be temporary. This can occur with obstructive sleep apnea, for example. Prolonged apnea means a person has stopped breathing. If the heart is still active, the condition is known as respiratory arrest. This is a life-threatening event that requires immediate medical attention and first aid. Prolonged apnea with no heart activity in a person who is not responsive is called cardiac (or cardiopulmonary) arrest. In infants and children, the most common cause of cardiac arrest is respiratory arrest. In adults, the opposite usually occurs, cardiac arrest leads to respiratory arrest.