Primary Functions:
* Protection: The rib cage, which forms the thorax, acts as a strong, bony shield for the heart and lungs. This is essential for protecting these delicate organs during development and after birth.
* Breathing: The lungs are located within the thorax and expand and contract during breathing. The rib cage helps to facilitate these movements, allowing for proper gas exchange.
* Circulation: The heart, also located within the thorax, is responsible for pumping blood throughout the body. The thoracic cavity provides a stable and protected environment for the heart to function optimally.
Other Functions:
* Supporting Structures: The thorax also provides attachment points for muscles involved in respiration and movement.
* Development: During fetal development, the thorax plays a key role in the growth and maturation of the lungs and heart.
Note: While a fetal pig's thorax performs these functions, it's important to remember that the lungs are not fully functional until after birth. The fetal pig relies on the placenta for oxygen and nutrient exchange.
Key Structures:
* Rib cage: A cage of bones (ribs) that protects the organs within.
* Sternum: The breastbone, which connects the ribs in the front.
* Heart: The central organ responsible for pumping blood.
* Lungs: The respiratory organs responsible for gas exchange.
Understanding the thorax of a fetal pig provides insight into the fundamental biological processes that are common to all mammals, including humans.