What is a Diaphragm?
A diaphragm is a crucial anatomical structure with two primary functions: respiratory and contraceptive.
The respiratory diaphragm is a large, dome-shaped muscle located below the lungs and heart. It plays a vital role in breathing. This thin muscle, attached to the sternum (breastbone), rib cage, and spine, contracts and relaxes rhythmically to facilitate inhalation and exhalation. When it contracts, the diaphragm flattens, increasing the volume of the chest cavity and drawing air into the lungs. When it relaxes, it resumes its dome shape, decreasing the chest cavity volume and expelling air from the lungs. [Source: My Cleveland Clinic, MedlinePlus Medical Encyclopedia Image, Nemours KidsHealth]
Key Features of the Respiratory Diaphragm:
- Location: Below the lungs and heart, separating the thoracic (chest) and abdominal cavities. [Source: StatPearls]
- Shape: Dome-shaped when relaxed, flattening upon contraction. [Source: MedlinePlus Medical Encyclopedia Image]
- Function: Major muscle of respiration, enabling breathing. [Source: MedlinePlus Medical Encyclopedia Image]
- Attachments: Sternum, rib cage, and spine.
The Contraceptive Diaphragm
The contraceptive diaphragm is a shallow, cup-shaped device made of soft silicone. It's inserted into the vagina before sexual intercourse and covers the cervix, preventing sperm from entering the uterus and thus preventing pregnancy. Spermicide is usually used with a diaphragm for added protection. [Source: Planned Parenthood, NHS inform, Better Health Channel]
Key Features of the Contraceptive Diaphragm:
- Material: Soft silicone. [Source: Planned Parenthood, NHS inform]
- Shape: Shallow cup, resembling a small saucer. [Source: Planned Parenthood]
- Function: Barrier method of contraception. [Source: Better Health Channel]
- Use: Inserted into the vagina before sex to cover the cervix. [Source: NHS inform]
In summary, the term "diaphragm" refers to two distinct yet important structures: a vital respiratory muscle and a contraceptive device. Both utilize a dome-like or cup-like shape to perform their respective functions.
