Question

part iv: summary questions: 1. identify the body cavity in which each of the following organs/organ systems are found: a. reproductive organs and bladder ____________ b. heart, lungs, trachea, esophagus, blood vessels __________ c. digestive organs ____________ 2. when there is an increased level of calcium ions in the blood, calcitonin is released from the thyroid gland. if this hormone is controlled by negative feedback, what effect would calcitonin have on blood calcium levels? 3. how are the following organ systems connected in terms of homeostasis: muscular, integumentary, cardiovascular, and nervous? what role does each system play? 4. how are the following organ systems connected in terms of homeostasis: integumentary, cardiovascular, nervous, digestive and urinary? what role does each system play?

Explanation:

1a. The reproductive organs and bladder are in the pelvic cavity. It is the lower - part of the abdominopelvic cavity and houses organs related to reproduction and urination.
1b. The heart, lungs, trachea, esophagus, and blood vessels are in the thoracic cavity. This cavity is separated from the abdominopelvic cavity by the diaphragm and contains vital organs for respiration and circulation.
1c. Digestive organs are mainly in the abdominal cavity, which is part of the abdominopelvic cavity and contains organs involved in digestion like the stomach, intestines, liver, etc.

1. Negative feedback aims to reverse a change. When blood calcium levels are high and calcitonin is released, it will decrease blood calcium levels. It does this by promoting calcium deposition in bones and reducing calcium re - absorption in the kidneys and intestines.
2. The muscular system generates heat and movement which can affect body temperature and position. The integumentary system helps regulate body temperature through sweating and vasoconstriction/dilation. The cardiovascular system transports nutrients, oxygen, and waste products and helps distribute heat. The nervous system controls and coordinates the activities of the other systems, sending signals to maintain balance. For example, it can signal the muscular system to shiver for heat production, or the integumentary system to adjust blood flow to the skin for temperature regulation.
3. The integumentary system helps regulate body temperature and provides a barrier. The cardiovascular system transports nutrients absorbed by the digestive system, oxygen, and waste products to be excreted by the urinary system. The nervous system controls and coordinates all these systems. The digestive system breaks down food and absorbs nutrients. The urinary system filters waste from the blood and maintains fluid and electrolyte balance. All these systems work together to maintain homeostasis in the body, such as regulating body temperature, fluid balance, and nutrient availability.

Answer:

1a. Pelvic cavity
1b. Thoracic cavity
1c. Abdominal cavity

1. Decrease blood calcium levels
2. Muscular system: generates heat and movement; Integumentary system: regulates body temperature; Cardiovascular system: transports substances and distributes heat; Nervous system: controls and coordinates other systems.
3. Integumentary system: regulates temperature and provides barrier; Cardiovascular system: transports substances; Nervous system: controls and coordinates; Digestive system: breaks down and absorbs nutrients; Urinary system: filters waste and maintains balance.