The Digestive system, and the Respiratory system.
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The pharynx belongs to both the respiratory system and the digestive system. It serves as a passageway for air to travel from the mouth and nose to the trachea and for food to travel from the mouth to the esophagus.
The nervous system and the endocrine system are the two major regulatory systems in the body.
The mammary glands belong to the reproductive system and the integumentary system. They are specialized glands within the breasts that produce milk for nourishing offspring, which is essential for reproduction. The integumentary system includes the skin and its associated structures, such as hair and nails, which also encompass the mammary glands.
The nervous system and endocrine system often work together to maintain homeostasis in the body. The nervous system controls rapid responses to changes in the environment, while the endocrine system regulates slower, long-term changes by releasing hormones into the bloodstream. Together, they help the body maintain a stable internal environment.
The seven passageways that lead to the pharynx are the two nasal passages, the two oral cavities, the two Eustachian tubes, and the larynx.
The nervous and endocrine systems act, in two different ways, to regulate activities and functions. The nervous system uses nerve impulses while the endocrine system uses hormones to chemically regulate organ systems.