The Blood Vessels and Blood

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Streamed on 15 Dec, 2025, 07:00 PM

ABOUT THIS SESSION

Blood vessels and blood form the foundation of human circulation, ensuring oxygen, nutrients, hormones, and immune cells reach every tissue while waste products are efficiently removed. Beyond simple transport, this dynamic system plays a critical role in metabolic regulation, inflammation, and organ health. Subtle disturbances in vascular function or blood composition can have far-reaching consequences, contributing to cardiometabolic, endocrine, and systemic disorders. In this webinar, Dr. Sanjay Kalra will explore the intricate relationship between blood and blood vessels, highlighting their clinical relevance and implications for everyday practice

Q&A

Blood is far more than a fluid that flows through vessels. It is a living tissue that constantly works to keep the body alive by transporting oxygen, nutrients, hormones, and immune signals to every cell.

Yes. Blood behaves like an endocrine organ because its cells not only carry hormones but also produce and respond to them, allowing continuous communication between different organs and systems.

Immature red blood cells, called erythroblasts, produce a hormone known as erythroferrone. This hormone helps regulate iron availability in the body.

Erythropoietin stimulates the production of red blood cells. As red cell production increases, erythroferrone levels rise, which helps make more iron available for hemoglobin formation.

White blood cells release chemical messengers such as cytokines and chemokines. These substances influence immune responses and inflammation locally, nearby, or throughout the body, similar to hormones.

Interleukin-6 has different effects depending on its source. When released from muscles during exercise, it helps reduce inflammation. When produced by immune cells during infection or disease, it promotes inflammation.

Beyond clot formation, platelets release several biologically active substances, including growth factors and serotonin. These help regulate inflammation, immunity, and tissue healing.

PDGF is a growth factor released by platelets that supports new blood vessel formation and tissue repair. It plays an important role in wound healing and recovery after injury.

The inner lining of blood vessels, called the endothelium, produces substances like nitric oxide and endothelin. These act as hormones that control blood vessel tone, blood flow, and vascular health.

Most serotonin is produced in the gut and stored in platelets circulating in the blood. It influences mood, digestion, blood vessel function, and overall well-being, highlighting the close link between the gut, blood, and brain.

FACULTY

Dr. Sanjay Kalra

Consultant & Head,Treasurer, International Society of Endocrinology (ISE), Vice President, South Asian Obesity Forum (SOF) Bharti Hospital, Karnal, Haryana, India

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