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.
Shortness of Breath: A Common Asthma Symptom. Asthma. Shortness of breath is one of the classic asthma symptoms people experience before being diagnosed with asthma or when their asthma is poorly controlled. Shortness of breath refers to feeling breathless or having difficulty breathing. Your doctor may refer to shortness of breath using the medical term dyspnea. There is no strict medical definition for shortness of breath. Patients will often describe this trouble breathing differently. You may hear shortness of breath described as: Being air hungry.