abomasum

fourth stomach

The fourth stomach of ruminating animals, which is an elongated pear-shaped sac lying on the floor of the abdomen, on the right-hand side, and roughly between the seventh and twelfth ribs. It leads to the beginning of the small intestine. (Adapted From Black's Veterinary Dictionary, 17th ed).

Loại Bone
Cấu trúc cha stomach glandular region
Tên Latin fourth stomach

Câu hỏi thường gặp

What is the abomasum?
The abomasum (fourth stomach) is the fourth and final stomach compartment of ruminant animals such as cattle, sheep, and goats. Unlike the first three forestomachs (rumen, reticulum, reticulum, and omasum), the abomasum is the 'true' stomach where enzymatic digestion of proteins occurs, analogous to the single stomach of monogastric animals like humans.
Where is the abomasum located?
The abomasum is an elongated pear-shaped sac that lies on the floor of the abdomen on the right-hand side, roughly between the seventh and twelfth ribs. It connects the omasum (third stomach) on one end and leads directly into the beginning of the small intestine (duodenum) on the other.
What is the function of the abomasum?
The abomasum secretes hydrochloric acid and digestive enzymes (particularly pepsin) to break down proteins in the feed that has been fermented and passed through the other stomach compartments. It functions as the principal site of enzymatic digestion in ruminants.
What conditions can affect the abomasum?
Displaced abomasum (particularly left-displaced abomasum) is a common condition in dairy cattle, especially after calving, where the organ shifts position and fills with gas. Abomasal volvulus (torsion) is a life-threatening emergency. Abomasal ulcers can also occur, particularly in calves.
How is the abomasum different from the rumen?
The rumen is the largest forestomach and functions as a fermentation vat where microorganisms digest plant fiber, while the abomasum is the true glandular stomach that secretes acid and enzymes for protein digestion. Feed passes through the rumen before reaching the abomasum.

Cấu trúc liên quan

mucus body coating mucous body coating mucus cocoon mucous cocoon Mullerian duct ductus paramesonephricus multi cell part structure cell part cluster multicellular anatomical structure multicellular structure multilaminar epithelium laminated epithelium multi-tissue structure multi-tissue structures multi-unit eye

Khuyến cáo Y tế

Nội dung này chỉ dành cho mục đích giáo dục và thông tin. Nội dung này không nhằm mục đích thay thế lời khuyên y tế chuyên nghiệp, chẩn đoán hoặc điều trị. Luôn tìm kiếm lời khuyên của bác sĩ hoặc nhà cung cấp dịch vụ y tế có đủ điều kiện khác đối với bất kỳ câu hỏi nào bạn có về tình trạng bệnh lý. Không bao giờ bỏ qua lời khuyên y tế chuyên nghiệp hoặc trì hoãn việc tìm kiếm vì điều gì đó bạn đã đọc trên trang web này.

Educational Disclaimer

This content is for educational and informational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider for medical decisions.

Data sources: Terminologia Anatomica, Foundational Model of Anatomy, Wikidata.