Leukocytes contribute to the function of the immune system and protect the body from the foreign infections. Leukocytes protect the body from microbial, viral, and parasitic infections, allergens, cancer-causing cells, and substances causing inflammation. They also scavenge dead and decaying cells, and tissues.

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Definition Definition Organism that lives in the body of another organism and obtains food at the expense of the host. A parasite can directly or indirect harm the host. There are two kinds of parasites: internal and external. An internal parasite lives inside another organism and is known as an endoparasite. An external parasite lives on the body surface of the host and is known as an ectoparasite. Protozoa and helminths are examples of major human parasites.

Chapter 18, Problem 10WWTS

Summary Introduction

Introduction:

Leukocytes contribute to the function of the immune system and protect the body from the foreign infections. Leukocytes protect the body from microbial, viral, and parasitic infections, allergens, cancer-causing cells, and substances causing inflammation. They also scavenge dead and decaying cells, and tissues.

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Definition Definition Organism that lives in the body of another organism and obtains food at the expense of the host. A parasite can directly or indirect harm the host. There are two kinds of parasites: internal and external. An internal parasite lives inside another organism and is known as an endoparasite. An external parasite lives on the body surface of the host and is known as an ectoparasite. Protozoa and helminths are examples of major human parasites.

Chapter 18, Problem 10WWTS

Summary Introduction

Introduction:

Leukocytes contribute to the function of the immune system and protect the body from the foreign infections. Leukocytes protect the body from microbial, viral, and parasitic infections, allergens, cancer-causing cells, and substances causing inflammation. They also scavenge dead and decaying cells, and tissues.

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Answer 3

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Definition Definition Organism that lives in the body of another organism and obtains food at the expense of the host. A parasite can directly or indirect harm the host. There are two kinds of parasites: internal and external. An internal parasite lives inside another organism and is known as an endoparasite. An external parasite lives on the body surface of the host and is known as an ectoparasite. Protozoa and helminths are examples of major human parasites.

Chapter 18, Problem 10WWTS

Summary Introduction

Introduction:

Leukocytes contribute to the function of the immune system and protect the body from the foreign infections. Leukocytes protect the body from microbial, viral, and parasitic infections, allergens, cancer-causing cells, and substances causing inflammation. They also scavenge dead and decaying cells, and tissues.

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Answer 4

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Definition Definition Organism that lives in the body of another organism and obtains food at the expense of the host. A parasite can directly or indirect harm the host. There are two kinds of parasites: internal and external. An internal parasite lives inside another organism and is known as an endoparasite. An external parasite lives on the body surface of the host and is known as an ectoparasite. Protozoa and helminths are examples of major human parasites.

Chapter 18, Problem 10WWTS

Summary Introduction