Pathogens can cause infected cells to produce a protein called "interferon." This substance causes nearby uninfected cells to produce enzymes that block the reproduction of pathogens.

Cytotoxic T cells, also called "killer T cells," attack dangerous cells by producing a protein that bursts the cell membrane.

Lymph is transported through lymph vessels. Special structures called "lymph nodes" filter lymph and store white blood cells. When the body is fighting an infection, white blood cells are produced in great numbers.

Important structures in the lymphatic system include the tonsils, thymus gland, and the spleen. The spleen is very important because it removes worn-out red blood cells, platelets, bacteria, and other things from the blood.

Phagocytes are leukocytes that engulf unwanted cells and pathogens in a nonspecific manner.

Macrophages are the largest leukocytes, and lymphocytes are leukocytes involved in specific defense activities.

T cells are lymphocytes that seek and destroy pathogens. There are several types of T cells.

When the body is fighting an infection, white blood cells are produced in great numbers.

Wondering what a career in the healthcare industry would be like? Curious about how you can prepare now? This video emphasizes the importance of Biology as a foundation for a career in healthcare, and takes students on a tour of various jobs and careers in the medical industry.

In this episode of UEN Homeroom,Jami Gardner - UEN's Utah Futures guru, drops in to share her insights on the Utah Futures program, how Utah students can prepare for their careers, and what the job market in Utah will be for our students.

On this episode of UEN Homeroom,things feel a bit different. Jared Covili joins this episode, no longer as a host, but as a guest! Jared left UEN to join Jordan School District. In this episode he speaks on his experience with the changing world of EdTech and what it will look like in the near future.

Jared Fawson moves from UEN Homeroom SuperSub into our featured expert this episode as we discuss professional learning. In this discussion we look at how learning has changed for educators, the need to have more diverse opportunities for professional growth, how tech plays a role in the changes, and golf.

This week in UEN Homeroom we are pleased to welcome Jason Eyre, Technology Department Coordinator for Murray School District. Our conversation this week includes topics such as: how Murray district has created a wireless LTE network for students to use at home for schoolwork, the impact of the digital divide in rural and urban school districts, the role the district can provide in overcoming the digital divide for students, and providing a model to help other district provide more access to homes.

Dani and Jared welcome Jeff Van Hulten, Director of Public Affairs for the Utah State Board of Education, to UEN Homeroom this week. Our discussion focuses on the 2021 Utah Legislative Session and how teachers can get involved. Some of our topics include: what all educators in Utah should know about the legislative process, the need to communicate with your local law makers, bills specific to education in 2021, and the need for teachers to be advocates for education.

This week UEN Homeroom is pleased to welcome Jenny Nicholas and Holly Reynolds, Social Studies teachers from West High School, to the podcast. Our discussion centers on the role teachers can play in talking with students about the recent protests and political unrest at the U.S. Capitol. We covered topics such as: how teachers can talk about the domestic terrorist attack on the Capitol, the role teachers play in addressing sensitive and passionate subjects, advice for teachers who don’t teach social studies or are elementary teachers in discussing current events, and how to help students to rebuild confidence in our democracy.

In our latest Learn @ Home episode, Jared Covili and Jared Fawson (Homeroom Super Sub) check in with Joe B. Wright, Executive Director of the Southwest Educational Service Center (SEDC) to learn more about the impact that distance learning is having on the students and faculties of Southern Utah. In our discussion we cover topics like: how rural Utah is helping all students receive broadband internet service, the need to balance work and home life for educators, and how to help school districts connect with their communities.

UEN Homeroom is pleased to welcome John Kelly, principal of Washington Elementary in Salt Lake School District, into our Learn @ Home series. During this episode we discuss the important role schools play in providing for the needs of the community, how to connect with your faculty and students while distancing, and the importance of communicating with your stakeholders.

The law of superposition states that in layers of sedimentary rock, younger layers are found at the top and older rocks are found at the bottom.

Toward the end of the precambrian era, simple animal ocean life appeared in the form on jelly fish, worms, sponges, and coral.

The theory of continental drift states that the present-day continents were joined together in a supercontinent called Pangaea. Over time, the continents drifted away from each other to their present-day positions.